{"id":137938,"date":"2020-07-21T06:59:02","date_gmt":"2020-07-20T22:59:02","guid":{"rendered":"http:\/\/4563.org\/?p=137938"},"modified":"2020-07-21T06:59:02","modified_gmt":"2020-07-20T22:59:02","slug":"%e9%9d%a2%e8%af%95%e4%ba%86%e5%87%a0%e4%b8%aa%e7%a8%8b%e5%ba%8f%e5%91%98%ef%bc%8c%e5%8f%91%e7%8e%b0%e4%bb%96%e4%bb%ac%e5%af%b9%e4%ba%8e-mysql-%e7%9a%84-distinct-%e5%85%b3%e9%94%ae%e5%ad%97%e9%83%bd","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=137938","title":{"rendered":"\u9762\u8bd5\u4e86\u51e0\u4e2a\u7a0b\u5e8f\u5458\uff0c\u53d1\u73b0\u4ed6\u4eec\u5bf9\u4e8e mysql \u7684 distinct \u5173\u952e\u5b57\u90fd\u5b58\u5728\u9519\u8bef\u7684\u7406\u89e3"},"content":{"rendered":"
\n
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\u9762\u8bd5\u4e86\u51e0\u4e2a\u7a0b\u5e8f\u5458\uff0c\u53d1\u73b0\u4ed6\u4eec\u5bf9\u4e8e mysql \u7684 distinct \u5173\u952e\u5b57\u90fd\u5b58\u5728\u9519\u8bef\u7684\u7406\u89e3 <\/h1>\n

<\/p>\n

\n
\u8cc7\u6df1\u5927\u4f6c : JJstyle <\/span> <\/i> 4<\/span> <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n
<\/p>\n

\u90fd\u8ba4\u4e3a\u8fd9\u662f\u4e00\u4e2a\u51fd\u6570\uff0c\u53ef\u4ee5\u8fd9\u6837\u7528\uff1a<\/p>\n

select distinct(name), age from test; <\/code><\/pre>\n
\u76ee\u7684\u662f\u7ed9 name \u53bb\u91cd\u3002\u867d\u7136\u6ca1\u6709\u62a5\u9519\uff0c\u4f46\u662f\u5176\u5b9e\u4e0a\u9762\u7684 sql \u6700\u7ec8\u88ab\u89e3\u6790\u6210\uff1a<\/p>\n
select distinct (name), age from test; <\/code><\/pre>\n
\u5c31\u662f\u8bf4 distinct \u4e0d\u662f\u4e00\u4e2a\u51fd\u6570\uff0c\u800c\u662f select \u7684\u4e00\u90e8\u5206\uff0c\u7ed3\u679c\u662f\u7ed9 name,age \u7684\u7ec4\u5408\u6570\u636e\u53bb\u91cd\uff0cname \u52a0\u62ec\u53f7\u5728\u8fd9\u91cc\u6ca1\u6709\u4ec0\u4e48\u610f\u4e49\u3002<\/p>\n
\u662f\u90a3\u79cd\u5de5\u4f5c\u4e86 3~5 \u5e74\u5de5\u4f5c\u7ecf\u9a8c\u7684\uff0c\u4e0d\u77e5\u9053 v \u53cb\u4eec\u53c8\u6ca1\u6709\u53d1\u73b0\u8fd9\u4e2a\u95ee\u9898\u3002<\/p>\n<\/p><\/div>\n
 \u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (41<\/span>)        <\/div>\n
 <\/div>\n<\/p><\/div>\n<\/p><\/div>\n
    \n
  • \n
    \n
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     \u8cc7\u6df1\u5927\u4f6c : mightofcode <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u5b66\u5230\u4e86\u5b66\u5230\u4e86                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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     \u8cc7\u6df1\u5927\u4f6c : yishengyongyi <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u8e29\u8fc7\u8fd9\u4e2a\u5751                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
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     \u8cc7\u6df1\u5927\u4f6c : achira <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u524d\u6bb5\u65f6\u95f4\u5728\u516c\u53f8\u5199 sql \u53d1\u73b0\u4e86\uff0c\u548c select \u7684\u9009\u53d6\u5b57\u6bb5\u53bb\u91cd\u65e0\u5173\u3002\u662f\u6574\u4f53\u53bb\u91cd\u3002\u5b9e\u4e60\u751f\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : XGF <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u96be\u602a\u67e5\u8be2\u8bed\u53e5\u7f8e\u5316\u7684\u65f6\u5019 distinct \u548c select \u662f\u540c\u4e00\u884c\u3002
    \u5f53\u7136\u6211\u5199\u7684\u65f6\u5019\u6ca1\u52a0\u62ec\u53f7\uff0c\u4e5f\u8ba4\u4e3a\u662f\u7ed9 name \u53bb\u91cd\uff08\u6342\u8138\uff09
    \u5b66\u5230\u4e86\uff0c\u5b66\u5230\u4e86                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
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     \u8cc7\u6df1\u5927\u4f6c : Xusually <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u55ef \u9700\u8981\u5355\u5217\u53bb\u91cd\uff0c\u4f46\u662f\u8981\u8bfb\u53d6\u591a\u5217\u7684\u7528 group by                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : gimp <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u54c8\u54c8\uff0c\u8fd9\u9898\u6211\u4f1a\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
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     \u8cc7\u6df1\u5927\u4f6c : yuk1no <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u5f04\u4e0d\u6e05\u7684\u53ef\u80fd\u6ca1\u600e\u4e48\u5b66\u8fc7 SQL
    \u5982\u679c distinct \u662f\u5355\u5217\u805a\u5408\uff0c\u5176\u4f59\u7684\u5217\u600e\u4e48\u5904\u7406\uff1f                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
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     \u8cc7\u6df1\u5927\u4f6c : allAboutDbmss <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u6211\u505a\u4e86\u4e00\u4e2a\u5f88\u5c0f\u7684\u4f8b\u5b50 \u7528\u7684\u662f PosgreSQL
    “`
    psql=# with test (a, b) as ( VALUES (1, 2), (1, 4), (1, 3) ) select distinct(t.a), t.b from test t;
     a | b 
    —+—
     1 | 3
     1 | 2
     1 | 4
    (3 rows)<\/p>\n
    psql=# explain with test (a, b) as ( VALUES (1, 2), (1, 4), (1, 3) ) select distinct(t.a), t.b from test t;
     QUERY PLAN 
    ———————————————————————
     HashAggregate (cost=0.11..0.14 rows=3 width=8)
     Group Key: t.a, t.b
     CTE test
     -> Values Scan on “*VALUES*” (cost=0.00..0.04 rows=3 width=8)
     -> CTE Scan on test t (cost=0.00..0.06 rows=3 width=8)
    (5 rows)
    “`                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : outerws <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @yuk1no \u53ef\u4ee5\u7528 group by \u66ff\u4ee3                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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     \u8cc7\u6df1\u5927\u4f6c : windyboy <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u6709\u7684\u65f6\u5019\u8003\u77e5\u8bc6\u70b9\u5e76\u4e0d\u662f\u5f88\u597d\u7684\u65b9\u6848
    \u6bd5\u7adf\u6709\u53ef\u80fd\u6ca1\u6709\u9047\u5230\u8fc7
    \u4f46\u5e76\u4e0d\u548c\u80fd\u529b\u6709\u76f4\u63a5\u5173\u8054                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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     \u8cc7\u6df1\u5927\u4f6c : toyassb <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u5443\uff0c\u770b\u8fd9\u4e2a\u7b2c\u4e00\u53cd\u5e94\u662f sql \u8fd8\u80fd\u8fd9\u4e48\u5199                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
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     \u8cc7\u6df1\u5927\u4f6c : javlib <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @allAboutDbmss \u6240\u4ee5\u4ece explain\uff0c\u53ef\u4ee5\u770b\u5230 group \u662f\u5bf9 t.a, t.b \u4e24\u4e2a\u5b57\u6bb5\u4e00\u8d77\u505a group \u3002
    \u8fd8\u6709\u5c31\u662f with \u53ef\u4ee5\u8fd9\u6837\u7528\uff0c\u5b66\u5230\u4e86\uff0c\u8c22\u8c22                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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     \u8cc7\u6df1\u5927\u4f6c : krixaar <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 distinct \u80fd\u8fd9\u6837\u7528\u7684\u8bdd\u5149\u8bed\u4e49\u4e0a\u90fd\u89e3\u91ca\u4e0d\u4e86\uff0cname \u76f8\u540c\u4f46 age \u4e0d\u540c\u7684\u884c\u53ea\u6311\u5176\u4e2d\u4e00\u4e2a\uff1f\u968f\u673a\u6311\uff1f\u6309\u987a\u5e8f\u6311\uff1f\u6309\u4ec0\u4e48\u987a\u5e8f\uff1f                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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     \u8cc7\u6df1\u5927\u4f6c : zppass <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u8fd9\u79cd distinct \u4e00\u822c\u6765\u8bf4\u5c31\u662f\u5355\u72ec\u4f7f\u7528\uff0c\u7b97\u4e2a\u6570\u7684\u8bdd\u4f1a\u4f7f\u7528\u3002\u4e00\u822c\u6765\u8bf4\u50cf\u805a\u5408\u67e5\u627e\u7684\u8bdd\u5c31\u662f\u7528 group by \u6765\u5c31\u6ee1\u8db3\u8981\u6c42\u4e86\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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     \u8cc7\u6df1\u5927\u4f6c : dongisking <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u597d\u5947 lz \u662f\u600e\u4e48\u627e\u5230\u7b54\u6848\u7684                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
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     \u8cc7\u6df1\u5927\u4f6c : aguesuka <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 7 \u624d\u662f\u6b63\u786e\u601d\u8def\u3002”\u662f\u4ec0\u4e48”\u800c\u4e0d\u662f”\u4e3a\u4ec0\u4e48”\uff0c\u6bd4\u8d77\u4ec0\u4e48\u90fd\u4e0d\u77e5\u9053\uff0c\u4e0d\u8fc7\u662f\u591a\u8e29\u4e00\u4e2a\u5751\u7f62\u4e86                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
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     \u8cc7\u6df1\u5927\u4f6c : HankAviator <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @zppass \u611f\u89c9 distinct \u6bd4 group by \u8d44\u6e90\u6d88\u8017\u66f4\u5927\u4e00\u70b9                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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     \u8cc7\u6df1\u5927\u4f6c : gz911122 <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u5367\u69fd\u90a3\u662f\u6709\u591a\u83dc                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
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     \u8cc7\u6df1\u5927\u4f6c : j0hnj <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 distinct \u4e0e\u805a\u5408\u51fd\u6570\u4e00\u8d77\u4f7f\u7528\u7684\u573a\u666f\u66f4\u5e38\u89c1\u4e00\u4e9b\uff0c\u6bd4\u5982 select count(distinct name), select group_concat(distinct score)                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
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     \u8cc7\u6df1\u5927\u4f6c : lovecy <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 distinct \u611f\u89c9\u662f\u51fa\u67e5\u8be2\u7ed3\u679c\u540e\u518d\u626b\u63cf\u67e5\u8be2\u7ed3\u679c\u53bb\u91cd\u7684\uff0c`SELECT DISTINCT \u5b57\u6bb5 FROM \u8868;`\u5982\u679c\u5b57\u6bb5\u6ca1\u6709\u7d22\u5f15\u5c31\u4f1a\u5168\u8868\u626b\u63cf\uff0c\u6211\u7684\u7406\u89e3\u5c31\u5230\u8fd9\u91cc\u4e86\u3002\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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     \u8cc7\u6df1\u5927\u4f6c : raaaaaar <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u6bd4\u8f83\u8d5e\u540c\uff0c\u201c\u662f\u4ec0\u4e48\u201d\u7684\u77e5\u8bc6\u66f4\u591a\u7684\u662f\u8003\u5bdf\u7ecf\u9a8c\uff0c\u80fd\u89e3\u91ca\u201c\u4e3a\u4ec0\u4e48\u201d\u7684\u77e5\u8bc6\u624d\u662f\u91cd\u70b9\uff0c\u540e\u8005\u8fd8\u80fd\u8003\u5bdf\u5e94\u8bd5\u8005\u7684\u601d\u8def                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
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     \u8cc7\u6df1\u5927\u4f6c : NetCobra <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u4ece\u6765\u6ca1\u6709\u8fd9\u4e48\u7528\u8fc7\uff0c\u610f\u601d\u4e0a\u4e5f\u89e3\u91ca\u4e0d\u901a\u3002
    \u53ea\u7ed9 name \u53bb\u91cd\u4e0d\u5e94\u8be5\u662f group by \u5417\uff1f                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : fhsan <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u6211\u90fd\u662f group by\uff0c\u5176\u5b9e\u4f60\u8fd9\u662f\u8003\u5bdf\u4e00\u6761 SQL \u6267\u884c\u5230\u5e95\u53d1\u751f\u4e86\u4ec0\u4e48                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : Still4 <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u6ca1\u8fd9\u4e48\u7528\u8fc7\u80af\u5b9a\u4e0d\u77e5\u9053\u7684\uff0c\u4e5f\u5c31\u662f\u8bf4\u76f8\u5f53\u4e8e
    “`
    select name,age from test group by name,age;
    “`                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : lxk11153 <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 select name,age from test group by name,age;
    select distinct name,age from test ;
    \u6709\u6027\u80fd\uff0c\u6216\u8005\u5185\u5b58\u5360\u7528\uff0c\u7b49\u7b49\u5dee\u5f02\u5417\uff1f\u6c42\u89e3                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
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     \u8cc7\u6df1\u5927\u4f6c : zsdroid <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u767e\u5ea6+bing \u641c\u7d22 distinct\uff0c\u6392\u7b2c\u4e00\u7684\u90fd\u662f w3school
    https:\/\/www.w3school.com.cn\/sql\/sql_distinct.asp
    \u8be5\u6559\u7a0b\u91cc\u53ea\u7528\u4e86\u4e00\u4e2a\u5b57\u6bb5\u6765\u505a\u6f14\u793a\uff0c\u6709\u4e00\u5b9a\u7684\u8bef\u5bfc\u6027\uff0c\u8ba9\u770b\u7684\u4eba\u4ee5\u4e3a\u8fd9\u662f\u9488\u5bf9\u67d0\u4e2a\u5b57\u6bb5\u7684\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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     \u8cc7\u6df1\u5927\u4f6c : wshcdr <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 w3school \u7684\u6559\u7a0b\u6709\u70b9\u4e00\u8a00\u96be\u5c3d                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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     \u8cc7\u6df1\u5927\u4f6c : chaffy <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u5b66\u4e60\u4e86\u5b66\u4e60\u4e86                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
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     \u8cc7\u6df1\u5927\u4f6c : Egfly <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u4f30\u8ba1\u662f\u6ca1\u7cfb\u7edf\u5b66\u8fc7 mysql\uff0c\u4e0d\u7136\u4e0d\u53ef\u80fd\u4e0d\u77e5\u9053\u8fd9\u4e2a                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
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     \u8cc7\u6df1\u5927\u4f6c : hheedat <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u5de5\u4f5c\u516d\u5e74\uff0c\u6ca1\u7528\u8fc7 distinct … \u5b66\u4e60\u4e86                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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     \u8cc7\u6df1\u5927\u4f6c : Chieh <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u86e4\uff1f\u600e\u4e48\u4f1a\u662f\u51fd\u6570 distinct \u53ea\u80fd\u548c select \u4e00\u8d77\u7528\uff0c\u6211\u4e00\u76f4\u5f53\u4f5c\u662f select \u7684\u53e6\u4e00\u4e2a\u7248\u672c                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : talen666 <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 (\u30fb\u3002\u30fb)\u867d\u7136\u7528\u7684\u5c11\uff0c\u4f46\u77e5\u9053\u662f\u4e2a\u5173\u952e\u5b57\uff0c\u4e0d\u662f\u51fd\u6570                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : Justin13 <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 <query spec> ::= SELECT [ ALL | DISTINCT ] <select list> <table expression>                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : walkerliu <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u8fd9\u79cd\u9898\u95ee\u6211\u867d\u7136\u6211\u80fd\u7b54\u7684\u4e0a\u6765\uff0c\u4f46\u6211\u89c9\u5f97\u8fd9\u79cd\u9898\u76ee\u662f\u95ee\u4e0d\u51fa\u4e00\u4e2a\u4eba\u7684\u771f\u5b9e\u6c34\u5e73\u7684                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : l00t <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u5c45\u7136\u8fd8\u80fd\u7406\u89e3\u6210\u53ea\u53bb\u91cd\u4e00\u4e2a\u5b57\u6bb5\u7684\u51fd\u6570\uff1f\u4ece\u77e5\u9053\u8fd9\u4e2a distinct \u5f00\u59cb\u5c31\u4ece\u6ca1\u90a3\u6837\u7406\u89e3\u8fc7\uff0c\u53e5\u610f\u4e0a\u90fd\u4e0d\u901a\u554a\u2026\u2026                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : jun0205 <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u8fd9\u79cd\u9762\u8bd5\u80fd\u8003\u5565\uff0c\u8fd9\u6837\u53bb\u91cd\u5e94\u8be5\u7528 group by \u7684\u5c45\u591a\u3002
    \u4f60\u8fd9\u7b97\u662f\u81ea\u5df1\u8bbe\u8ba1\u7684\u4e00\u4e2a\u5751\uff0c\u5927\u90e8\u5206\u4eba\u7528\u4e5f\u4e0d\u4f1a\u8fd9\u6837\u7528\uff0c\u6587\u6863\u8bed\u6cd5\u4e5f\u6ca1\u6709\u8fd9\u79cd\uff0c\u4e5f\u5c31\u4e0d\u4f1a\u9047\u4e0d\u5230\u8fd9\u4e2a\u5751\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : Narcissu5 <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @yuk1no \u5b9e\u9645\u4e0a group \u4e5f\u6709\u8fd9\u79cd\u7684\u95ee\u9898\uff0c\u805a\u5408\u6761\u4ef6\u4e4b\u5916\u7684\u5217\u600e\u4e48\u5904\u7406\uff0csqlserver\uff0coracle \u91cc\u9762\u8fd9\u6837\u7684\u5217\u4e0d\u5e26\u805a\u5408\u51fd\u6570\u5c31\u4f1a\u62a5\u9519<\/p>\n
    \u4f46\u662f mysql \u662f\u53ef\u4ee5\u6b63\u5e38\u5de5\u4f5c\u7684\uff0c\u662f\u7684\uff0cmysql \u5c31\u662f\u8fd9\u6837\u4e00\u79cd\u795e\u5947\u7684\u6570\u636e\u5e93\u3002\u6240\u4ee5\u5728 mysql \u91cc\u9762\u5373\u4f7f\u8ba4\u4e3a\u662f\u5355\u5217\u805a\u5408\u4e5f\u6ca1\u4ec0\u4e48\u8bf4\u4e0d\u901a\u7684                                                            <\/p><\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : yuwangG <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u5b66\u5230\u4e86~                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : aguesuka <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @Narcissu5 \u6ca1\u5f00\u4e25\u683c\u6a21\u5f0f                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : leonardyang <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u6211\u8bb0\u5f97 distinct \u5728 oracle \u548c sqlserver \u7684\u8bed\u6cd5\u6811\u4e0a\u662f\u5173\u952e\u5b57\u5427\uff0c\u80af\u5b9a\u4e0d\u662f\u51fd\u6570                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : dingyaguang117 <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u80fd\u5199\u51fa\u8fd9\u79cd SQL\uff0c \u672c\u8eab\u601d\u7ef4\u5c31\u4e0d\u4e25\u8c28                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n","protected":false},"excerpt":{"rendered":"
    \u9762\u8bd5\u4e86\u51e0\u4e2a\u7a0b\u5e8f\u5458\uff0c\u53d1\u73b0\u4ed6\u4eec\u5bf9\u4e8e m…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[],"_links":{"self":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/137938"}],"collection":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=137938"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/137938\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=137938"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=137938"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=137938"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}