{"id":94102,"date":"2020-04-24T19:47:30","date_gmt":"2020-04-24T11:47:30","guid":{"rendered":"http:\/\/4563.org\/?p=94102"},"modified":"2020-04-24T19:47:30","modified_gmt":"2020-04-24T11:47:30","slug":"mysql-%e4%b8%ad-varchar100%e4%b8%8e-varchar255%e5%8c%ba%e5%88%ab%e6%98%af%e4%bb%80%e4%b9%88%ef%bc%9f","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=94102","title":{"rendered":"MySQL \u4e2d varchar(100)\u4e0e varchar(255)\u533a\u522b\u662f\u4ec0\u4e48\uff1f"},"content":{"rendered":"
\n
\n
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MySQL \u4e2d varchar(100)\u4e0e varchar(255)\u533a\u522b\u662f\u4ec0\u4e48\uff1f <\/h1>\n

<\/p>\n

\n
\u8cc7\u6df1\u5927\u4f6c : zealinux <\/span> <\/i> 21<\/span> <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n
<\/p>\n

\u6bd4\u5982\u6211\u6709\u4e2a\u5b57\u6bb5\u4e0d\u4f1a\u8d85\u8fc7 64 \u4e2a\u5b57\u7b26\uff0c\u90a3\u6211\u6570\u636e\u5e93\u8868\u521b\u5efa\u7684\u65f6\u5019\uff0c \u8bbe\u7f6e\u6210<\/p>\n

\n

varchar(100)\u4e0e varchar(255)<\/p>\n<\/blockquote>\n

\u6709\u4ec0\u4e48\u533a\u522b\uff1f<\/p>\n

\u731c\u60f3\uff1a255 \u80af\u5b9a\u4e0d\u4f1a\u6bd4 100 \u5185\u5b58\u5360\u7528\u91cf\u4e24\u500d\u3002<\/p>\n

\u4e4b\u524d MySQL \u4e2d\u7684\u5b57\u6bb5\u957f\u5ea6\u90fd\u6bd4\u8f83\u968f\u610f\u3002<\/p>\n<\/p><\/div>\n

\u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (14<\/span>) <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n
    \n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : b821025551b <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u7d22\u5f15\uff0c\u5f15\u64ce\u4f18\u5316 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : est <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    varchar \u4e0d\u8bbe\u7f6e\u4e3a\u4e3b\u952e\u4e0d\u8bbe\u7f6e\u4e3a\u7d22\u5f15\u5e94\u8be5\u4e0d\u4f1a\u5360\u5185\u5b58\u5440\u3002(\u8981\u5360\u7f13\u5b58 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : sadfQED2 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u4e0d\u8d85\u8fc7 64 \u4e2a\u5b57\u7b26\u4e3a\u5565\u4e0d\u8bbe\u7f6e\u6210 varchar64 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : GoLand <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    varchar \u957f\u5ea6\u662f\u53ef\u53d8\u7684\uff0c\u867d\u7136\u5b9a\u4e49\u7684\u65f6\u5019\u6307\u5b9a 255\uff0c\u4f46\u662f\u5b58\u4e00\u4e2a 100 \u957f\u5ea6\u7684\u5360\u7528\u7a7a\u95f4\u5c31\u662f 100 \u4e2a\u957f\u5ea6\u6240\u5360\u7528\u7684\u7a7a\u95f4\u3002https:\/\/dev.mysql.com\/doc\/refman\/5.7\/en\/char.html <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : wangyzj <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u5c0f\u4e8e 100 \u7684\u5b57\u7b26\u4e32\u5b58\u50a8 varchar100 \u548c varchar255 \u5e94\u8be5\u662f\u6ca1\u533a\u522b
    \u5427\uff01 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : Maboroshii <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u5360\u7528\u7a7a\u95f4\u5e94\u8be5\u662f\u76f8\u540c\u7684\uff0c\u4e0d\u8fc7 mysql \u6709\u4e2a\u9ed8\u8ba4\u7d22\u5f15\u957f\u5ea6\u9650\u5236\uff0cvarchar \u592a\u957f\u4e86\u4e0d\u80fd\u5efa\u7d22\u5f15 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : x97bgt <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    MYSQL \u603b\u7684\u5b57\u6bb5\u957f\u5ea6\u4e0d\u80fd\u8d85\u8fc7 65535 \uff08\u597d\u50cf\u662f\u8fd9\u4e2a\u503c\uff09\u4e2a\u5b57\u8282\u3002\u8fd9\u5728\u5efa\u8868\u65f6\u4f1a\u6309\u53ef\u80fd\u7684\u6700\u5927\u5b57\u7b26\u53bb\u8ba1\u7b97\uff0c\u4e5f\u5c31\u662f varchr \u91cc\u7684\u6570\u5b57\u3002
    \u53e6\u5916\u5b58\u50a8\u4e0a\uff0c\u8d85\u8fc7 255 \u7684 varchar\uff0c\u5b57\u6bb5\u540d\u4f1a\u5360\u636e 2 \u5b57\u8282\uff0c\u5c0f\u4e8e 255 \u6b21\u5360\u7528 1 \u5b57\u8282\u3002\u6240\u4ee5\u603b\u5b57\u6bb5\u957f\u5ea6\u4e0d\u9650\u5236\u7684\u60c5\u51b5\u4e0b\uff0c\u4e00\u822c\u628a varchar \u7684\u957f\u5ea6\u8bbe\u6210 255 \u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : SjwNo1 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u4e0d\u8d85\u8fc7 64 \u4e2a\u5b57\u7b26\u4e3a\u5565\u4e0d\u8bbe\u7f6e\u6210 varchar64
    +1 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : zealinux <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @sadfQED2 @SjwNo1 <\/p>\n

    \u8fd8\u662f\u90a3\u4e2a\u95ee\u9898\uff0cvarchar64 \u4e0e varchar100 \u7684\u533a\u522b\u662f\u4ec0\u4e48\uff1f <\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : xpresslink <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    varchar(100)\u4e0e varchar(255)\u4e3b\u8981\u533a\u522b\uff1a
    \uff08 1 \uff09\u5f53\u5b58\u50a8\u7684\u5b57\u7b26\u4e32\u957f\u5ea6\u5c0f 100 \u65f6\uff0c\u4e24\u8005\u5360\u7528\u7684\u78c1\u76d8\u7a7a\u95f4\u4e00\u6837\uff0c\u4f46\u662f\u6d88\u8017\u7684\u5185\u5b58\u4e0d\u4e00\u6837\uff0c\u66f4\u957f\u7684\u5217\u6d88\u8017\u7684\u5185\u5b58\u4f1a\u66f4\u591a\u3002\u56e0\u4e3a MySQL \u901a\u5e38\u4f1a\u5206\u914d\u56fa\u5b9a\u5927\u5c0f\u7684\u5185\u5b58\u5757\u6765\u4fdd\u5b58\u5185\u90e8\u503c\u3002\u5c24\u5176\u662f\u4f7f\u7528\u4e34\u65f6\u8868\u8fdb\u884c\u6392\u5e8f\u4f1a\u64cd\u4f5c\u65f6\uff0c\u4f1a\u6d88\u8017\u66f4\u591a\u7684\u5185\u5b58\u3002\u5728\u4f7f\u7528\u78c1\u76d8\u8fdb\u884c\u6392\u5e8f\u65f6\uff0c\u4e5f\u662f\u4e00\u6837\u3002<\/p>\n

    (2)\u6309\u7167 SQL \u6807\u51c6\u5411\u6570\u636e\u5e93\u91cc\u9762\u63d2\u5165\u6570\u636e\u65f6\u5019\uff0c
    \u5bf9\u957f\u5ea6\u5927\u4e8e 100 \u5b57\u7b26\u4e32\uff0cVarchar \uff08 100 \uff09\u5b57\u81ea\u6bb5\u5c31\u4f1a\u4e22\u5f03\u5927\u4e8e 100 \u90e8\u5206\u3002
    \u5bf9\u957f\u5ea6\u5927\u4e8e 255 \u5b57\u7b26\u4e32\uff0cVarchar \uff08 255 \uff09\u5b57\u81ea\u6bb5\u5c31\u4f1a\u4e22\u5f03\u5927\u4e8e 255 \u90e8\u5206\u3002
    \u8fd9\u662f\u4e2a\u5f88\u5751\u7684\u7279\u6027\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : SjwNo1 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @zealinux
    \u533a\u522b\u5c31\u662f \u9884\u7559\u7684\u5185\u5b58\u5927\u5c0f\u4e0d\u4e00\u6837\uff0csql \u5b58\u5165\u957f\u5ea6\u8d85\u8fc7\u4f60\u7684\u9884\u8bbe\u4f1a\u62a5\u9519\u7684 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : Oktfolio <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u7d22\u5f15\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : msg7086 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u603b\u7684\u884c\u957f\u6709\u9650\u5236\u3002
    \u53e6\u5916\u5b57\u7b26\u4e32\u957f\u5ea6\u8fd8\u8981\u8003\u8651\u5b57\u7b26\u96c6\uff0cUTF8 \u5b58 64 \u5b57\u8282\u5b57\u7b26\u4e32\u5e76\u4e0d\u4e00\u5b9a\u80fd\u5b58\u4e0b 64 \u4e2a\u5b57\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : Aresxue <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u771f\u5b9e\u5360\u7528\u6ca1\u533a\u522b\uff0c\u4f46\u662f\u5728\u7d22\u5f15\u521b\u5efa\u65b9\u9762\u6709\u533a\u522b\uff0c\u4e5f\u4f1a\u5f71\u54cd\u603b\u7684\u884c\u957f\uff0c\u8fdb\u800c\u5f71\u54cd\u884c\u7684\u7ec4\u7ec7\u65b9\u5f0f\uff0c\u53ef\u80fd\u4f1a\u9891\u7e41\u5f15\u8d77\u9875\u5206\u88c2\u5565\u7684\uff0c\u6240\u4ee5\u80fd\u786e\u5b9a\u5c0f\u4e8e 64 \u5c31 varchar(64), \u540e\u7eed\u53ef\u80fd\u4f1a\u6709\u6539\u52a8\u53c8\u4e0d\u77e5\u9053\u591a\u5927\u5c31\u76f4\u63a5 varchar(255)\uff0c\u4e0d\u7136\u4ece\u5c0f\u6539\u5230\u5927\u9501\u8868\u65f6\u95f4\uff0c\u8fd8\u6709\u4e0a\u9762\u8bf4\u5230\u7684\u9875\u5206\u88c2\u90fd\u6709\u53ef\u80fd\u5f15\u53d1\u95ee\u9898 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n","protected":false},"excerpt":{"rendered":"

    MySQL \u4e2d varchar(1…<\/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\/94102"}],"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=94102"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/94102\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=94102"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=94102"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=94102"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}