{"id":65311,"date":"2026-01-24T20:24:28","date_gmt":"2026-01-24T12:24:28","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/65311.html"},"modified":"2026-01-24T20:24:28","modified_gmt":"2026-01-24T12:24:28","slug":"mysql%e7%9a%84%e8%bf%90%e7%ae%97%e7%ac%a6%e4%b8%8e%e8%a1%a8%e8%be%be%e5%bc%8f%e5%9f%ba%e7%a1%80%e7%89%88%ef%bc%8c%e6%96%b0%e6%89%8b%e6%95%99%e5%ad%a6","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/65311.html","title":{"rendered":"MySQL\u7684\u8fd0\u7b97\u7b26\u4e0e\u8868\u8fbe\u5f0f(\u57fa\u7840\u7248\uff0c\u65b0\u624b\u6559\u5b66)"},"content":{"rendered":"

1.\u7b97\u672f\u8fd0\u7b97\u7b26<\/h3>\n

(1).＋\u52a0\u6cd5\u8fd0\u7b97<\/p>\n

select<\/span> 5<\/span>+3;<\/span><\/p>\n

\u8fd0\u7b97\u7ed3\u679c<\/p>\n

+—–+
\n|<\/span> 3<\/span>+5 |<\/span>
\n+—–+
\n|<\/span> 8<\/span> |<\/span>
\n+—–+
\n1<\/span> row in<\/span> set<\/span> (<\/span>0.01<\/span> sec)<\/span><\/p>\n

(2).- \u51cf\u6cd5\u8fd0\u7b97<\/p>\n

select<\/span> 5<\/span>-3-2;<\/span>
\n \u8fd0\u7b97\u7ed3\u679c
\n+——-+
\n|<\/span> 5<\/span>-3-2 |<\/span>
\n+——-+
\n|<\/span> 0<\/span> |<\/span>
\n+——-+
\n1<\/span> row in<\/span> set<\/span> (<\/span>0.00<\/span> sec)<\/span><\/p>\n

(3).*\u4e58\u6cd5\u8fd0\u7b97<\/p>\n

select<\/span> 3<\/span>*5;<\/span>
\n\u8fd0\u7b97\u7ed3\u679c
\n+—–+
\n|<\/span> 3<\/span>*5 |<\/span>
\n+—–+
\n|<\/span> 15<\/span> |<\/span>
\n+—–+
\n1<\/span> row in<\/span> set<\/span> (<\/span>0.00<\/span> sec)<\/span><\/p>\n

(4).\u9664\u6cd5\u8fd0\u7b97<\/p>\n

select<\/span> 3<\/span>\/5;<\/span>
\n \u8fd0\u7b97\u7ed3\u679c
\n+——–+
\n|<\/span> 3<\/span>\/5 |<\/span>
\n+——–+
\n|<\/span> 0.6000<\/span> |<\/span>
\n+——–+
\n1<\/span> row in<\/span> set<\/span> (<\/span>0.01<\/span> sec)<\/span><\/p>\n

(5)div\u8fd0\u7b97\u4e5f\u662f\u9664\u6cd5\u8fd0\u7b97，\u4f46\u662f\u53ea\u53d6\u6574\u6570<\/p>\n

select<\/span> 7<\/span> div 5<\/span>;<\/span>
\n\u8fd0\u7b97\u7ed3\u679c
\n+———+
\n|<\/span> 7<\/span> div 5<\/span> |<\/span>
\n+———+
\n|<\/span> 1<\/span> |<\/span>
\n+———+
\n1<\/span> row in<\/span> set<\/span> (<\/span>0.00<\/span> sec)<\/span><\/p>\n

(6).\u53d6\u4f59\u8fd0\u7b97%<\/p>\n

select<\/span> 7<\/span>%5;<\/span>
\n\u8fd0\u7b97\u7ed3\u679c
\n+——+
\n|<\/span> 7<\/span>%5 |<\/span>
\n+——+
\n|<\/span> 2<\/span> |<\/span>
\n+——+
\n1<\/span> row in<\/span> set<\/span> (<\/span>0.00<\/span> sec)<\/span><\/p>\n

(7).mod\u8fd0\u7b97（\u540c\u4f5c\u7528%\u4e00\u6837）<\/p>\n

select<\/span> 12<\/span> mod 5<\/span>;<\/span>
\n\u8fd0\u7b97\u7ed3\u679c
\n+———-+
\n|<\/span> 12<\/span> mod 5<\/span> |<\/span>
\n+———-+
\n|<\/span> 2<\/span> |<\/span>
\n+———-+
\n1<\/span> row in<\/span> set<\/span> (<\/span>0.00<\/span> sec)<\/span><\/p>\n

2.\u6bd4\u8f83\u8fd0\u7b97\u7b26<\/h3>\n

(1).\u4e00\u4e9b\u57fa\u7840\u7684\u8fd0\u7b97\u7b26=,<,>,<=,>=,!=(<>\u8fd9\u4e2a\u4e5f\u662f\u4e0d\u7b49\u4e8e\u7684\u610f\u601d)
\n\u8fd9\u91cc\u6210\u7acb\u8fd4\u56de1，\u4e0d\u6210\u7acb\u8fd4\u56de0<\/p>\n

select<\/span> 2<\/span><<\/span>3<\/span>,2<\/span>><\/span>3,2<\/span>=<\/span>3<\/span>,2<\/span><<\/span>=<\/span>3<\/span>,2<\/span>><\/span>=<\/span>3,2<\/span>!=<\/span>3<\/span>,2<\/span><><\/span>3<\/span>;<\/span>
\n\u8fd0\u7b97\u7ed3\u679c
\n+—–+—–+—–+——+——+——+——+
\n|<\/span> 2<\/span><<\/span>3<\/span> |<\/span> 2<\/span>><\/span>3<\/span> |<\/span> 2<\/span>=<\/span>3<\/span> |<\/span> 2<\/span><<\/span>=<\/span>3<\/span> |<\/span> 2<\/span>><\/span>=<\/span>3<\/span> |<\/span> 2<\/span>!=<\/span>3<\/span> |<\/span> 2<\/span><><\/span>3<\/span> |<\/span>
\n+—–+—–+—–+——+——+——+——+
\n|<\/span> 1<\/span> |<\/span> 0<\/span> |<\/span> 0<\/span> |<\/span> 1<\/span> |<\/span> 0<\/span> |<\/span> 1<\/span> |<\/span> 1<\/span> |<\/span>
\n+—–+—–+—–+——+——+——+——+
\n1<\/span> row in<\/span> set<\/span> (<\/span>0.00<\/span> sec)<\/span><\/p>\n

(2)is null\u662f\u4e3a\u7a7a\u5417，is not null \u662f\u4e0d\u4e3a\u7a7a\u5417;<\/p>\n

select<\/span> 1<\/span> is null,2 is not null,null is null,null is not null;<\/span>
\n\u8fd0\u7b97\u7ed3\u679c
\n+———–+—————+————–+——————+
\n|<\/span> 1<\/span> is null |<\/span> 2<\/span> is not null |<\/span> null is null |<\/span> null is not null |<\/span>
\n+———–+—————+————–+——————+
\n|<\/span> 0<\/span> |<\/span> 1<\/span> |<\/span> 1<\/span> |<\/span> 0<\/span> |<\/span>
\n+———–+—————+————–+——————+
\n1<\/span> row in<\/span> set<\/span> (<\/span>0.00<\/span> sec)<\/span><\/p>\n

(3).between \u2026 and \u2026\u4ecb\u4e8e\u4ec0\u4e48\u548c\u4ec0\u4e48\u4e4b\u95f4,not between\u2026 and\u2026\u4e0d\u4ecb\u4e8e\u4ec0\u4e48\u4ec0\u4e48<\/p>\n

select<\/span> 1<\/span> between 1<\/span> and 10,1<\/span> not between 1<\/span> and 10<\/span>;<\/span>\/\/1\u662f\u5426\u4ecb\u4e8e1\u548c10\u4e4b\u95f4
\n，1\u662f\u5426\u4e0d\u4ecb\u4e8e1\u548c10\u4e4b\u95f4
\n\u8fd0\u7b97\u7ed3\u679c
\n+——————–+————————+
\n|<\/span> 1<\/span> between 1<\/span> and 10<\/span> |<\/span> 1<\/span> not between 1<\/span> and 10<\/span> |<\/span>
\n+——————–+————————+
\n|<\/span> 1<\/span> |<\/span> 0<\/span> |<\/span>
\n+——————–+————————+
\n1<\/span> row in<\/span> set<\/span> (<\/span>0.00<\/span> sec)<\/span><\/p>\n

(4).in\u2026\u5c5e\u4e8e\u4ec0\u4e48\u4ec0\u4e48，not in\u2026\u4e0d\u5c5e\u4e8e\u4ec0\u4e48\u4ec0\u4e48<\/p>\n

select<\/span> 3<\/span> in<\/span> (<\/span>1,2<\/span>,3,4,5)<\/span>,7 not in<\/span> (<\/span>1,2<\/span>,3,7)<\/span>;<\/span>
\n\u8fd0\u7b97\u7ed3\u679c
\n+——————+——————–+
\n|<\/span> 3<\/span> in<\/span> (<\/span>1,2<\/span>,3,4,5)<\/span> |<\/span> 7<\/span> not in<\/span> (<\/span>1,2<\/span>,3,7)<\/span> |<\/span>
\n+——————+——————–+
\n|<\/span> 1<\/span> |<\/span> 0<\/span> |<\/span>
\n+——————+——————–+
\n1<\/span> row in<\/span> set<\/span> (<\/span>0.00<\/span> sec)<\/span><\/p>\n

(5).like (\u201cstr%\u201d)\u5339\u914dstr\u5417，not like (\u201cstr%\u201d)\u4e0d\u5339\u914dstr\u5417<\/p>\n

select<\/span> "abcdefg"<\/span> like (<\/span>"abc%"<\/span>)<\/span>,"abcdefg"<\/span> not like (<\/span>"abc%"<\/span>)<\/span>;<\/span>
\n\u8fd0\u7b97\u7ed3\u679c
\n+————————-+—————————–+
\n|<\/span> "abcdefg"<\/span> like (<\/span>"abc%"<\/span>)<\/span> |<\/span> "abcdefg"<\/span> not like (<\/span>"abc%"<\/span>)<\/span> |<\/span>
\n+————————-+—————————–+
\n|<\/span> 1<\/span> |<\/span> 0<\/span> |<\/span>
\n+————————-+—————————–+
\n1<\/span> row in<\/span> set<\/span> (<\/span>0.00<\/span> sec)<\/span><\/p>\n

(6).regexp\u6b63\u5219\u8868\u8fbe\u5f0f"^\u201c\u8868\u793a\u5339\u914d\u5f00\u59cb\u90e8\u5206\u5417，\u201d$"\u8868\u793a\u5339\u914d\u7ed3\u5c3e\u90e8\u5206<\/p>\n

select<\/span> "abcdef"<\/span> regexp "^ap"<\/span>,"abcdef"<\/span> regexp "ef$"<\/span>;<\/span>
\n\u8fd0\u7b97\u7ed3\u679c
\n+———————–+———————–+
\n|<\/span> "abcdef"<\/span> regexp "^ap"<\/span> |<\/span> "abcdef"<\/span> regexp "ef$"<\/span> |<\/span>
\n+———————–+———————–+
\n|<\/span> 0<\/span> |<\/span> 1<\/span> |<\/span>
\n+———————–+———————–+
\n1<\/span> row in<\/span> set<\/span> (<\/span>0.00<\/span> sec)<\/span><\/p>\n

3.\u903b\u8f91\u8fd0\u7b97\u7b26<\/h3>\n

(1).&&\u903b\u8f91\u4e0e\u51681\u4e3a1，\u67090\u52190(\u6709NULL\u5219\u4e3aNULL)<\/p>\n

select<\/span> null &&<\/span> 1,2<\/span> &&<\/span> 2<\/span>, 3<\/span> &&<\/span> 0<\/span>;<\/span>
\n\u8fd0\u7b97\u7ed3\u679c
\n+———–+——–+——–+
\n|<\/span> null &&<\/span> 1<\/span> |<\/span> 2<\/span> &&<\/span> 2<\/span> |<\/span> 3<\/span> &&<\/span> 0<\/span> |<\/span>
\n+———–+——–+——–+
\n|<\/span> NULL |<\/span> 1<\/span> |<\/span> 0<\/span> |<\/span>
\n+———–+——–+——–+
\n1<\/span> row in<\/span> set<\/span> (<\/span>0.00<\/span> sec)<\/span><\/p>\n

(2).||\u903b\u8f91\u6216\u67091\u4e3a1，\u51680\u4e3a0<\/p>\n

select<\/span> null ||<\/span> 1,2<\/span> ||<\/span> 2<\/span>, 3<\/span> ||<\/span> 0<\/span>;<\/span>
\n \u8fd0\u7b97\u7ed3\u679c
\n+———–+——–+——–+
\n|<\/span> null ||<\/span> 1<\/span> |<\/span> 2<\/span> ||<\/span> 2<\/span> |<\/span> 3<\/span> ||<\/span> 0<\/span> |<\/span>
\n+———–+——–+——–+
\n|<\/span> 1<\/span> |<\/span> 1<\/span> |<\/span> 1<\/span> |<\/span>
\n+———–+——–+——–+
\n1<\/span> row in<\/span> set<\/span> (<\/span>0.00<\/span> sec)<\/span><\/p>\n

(3).!\u903b\u8f91\u975e0\u4e3a1,1\u4e3a0(\u6709NULL\u5219\u4e3aNULL)<\/p>\n

select<\/span> !<\/span>null,!<\/span>1<\/span>,!<\/span>0<\/span>;<\/span>
\n\u8fd0\u7b97\u7ed3\u679c
\n+——-+—-+—-+
\n|<\/span> !<\/span>null |<\/span> !<\/span>1<\/span> |<\/span> !<\/span>0<\/span> |<\/span>
\n+——-+—-+—-+
\n|<\/span> NULL |<\/span> 0<\/span> |<\/span> 1<\/span> |<\/span>
\n+——-+—-+—-+
\n1<\/span> row in<\/span> set<\/span> (<\/span>0.00<\/span> sec)<\/span><\/p>\n

(4).xor\u5f02\u6216\u201c\u4e00\u771f\u4e00\u5047\u5219\u4e3a1，\u5168\u771f\u5168\u5047\u5219\u4e3a0\u201d(\u6709NULL\u5219\u4e3aNULL)<\/p>\n

select<\/span> null XOR 1,2<\/span> XOR 2<\/span>, 3<\/span> XOR 0<\/span>;<\/span>
\n\u8fd0\u7b97\u7ed3\u679c
\n+————+———+———+
\n|<\/span> null XOR 1<\/span> |<\/span> 2<\/span> XOR 2<\/span> |<\/span> 3<\/span> XOR 0<\/span> |<\/span>
\n+————+———+———+
\n|<\/span> NULL |<\/span> 0<\/span> |<\/span> 1<\/span> |<\/span>
\n+————+———+———+
\n1<\/span> row in<\/span> set<\/span> (<\/span>0.00<\/span> sec)<\/span><\/p>\n

4.\u4f4d\u8fd0\u7b97\u7b26(\u5c06\u5176\u8f6c\u6362\u4e3a\u4e8c\u8fdb\u5236\u6570\u540e\u5bf9\u5e94\u8fdb\u884c\u4e0a\u8ff03\u8fd0\u7b97\u5f97\u5230<\/h3>\n

\u4e00\u4e2a\u65b0\u7684\u4e8c\u8fdb\u5236\u6570\u540e\u8f6c\u5316\u4e3a\u5341\u8fdb\u5236\u6570)<\/h3>\n

(1)&\u6309\u4f4d\u4e0e<\/p>\n

select<\/span> 3<\/span>&<\/span>2<\/span>;<\/span>
\n\u8fd0\u7b97\u7ed3\u679c
\n+—–+
\n|<\/span> 3<\/span>&<\/span>2<\/span> |<\/span>
\n+—–+
\n|<\/span> 2<\/span> |<\/span>
\n+—–+
\n1<\/span> row in<\/span> set<\/span> (<\/span>0.00<\/span> sec)<\/span><\/p>\n

(2).|\u6309\u4f4d\u6216<\/p>\n

select<\/span> 5<\/span>|<\/span>6<\/span>;<\/span>
\n\u8fd0\u7b97\u7ed3\u679c
\n+—–+
\n|<\/span> 5<\/span>|<\/span>6<\/span> |<\/span>
\n+—–+
\n|<\/span> 7<\/span> |<\/span>
\n+—–+
\n1<\/span> row in<\/span> set<\/span> (<\/span>0.00<\/span> sec)<\/span><\/p>\n

(3)~\u6309\u4f4d\u53d6\u53cd<\/p>\n

select<\/span> ~3;<\/span>
\n\u8fd0\u7b97\u7ed3\u679c
\n+———————-+
\n|<\/span> ~3 |<\/span>
\n+———————-+
\n|<\/span> 18446744073709551612<\/span> |<\/span>
\n+———————-+
\n1<\/span> row in<\/span> set<\/span> (<\/span>0.00<\/span> sec)<\/span><\/p>\n

(4).^\u6309\u4f4d\u5f02\u6216<\/p>\n

select<\/span> 3<\/span>^5;<\/span>
\n\u8fd0\u7b97\u7ed3\u679c
\n+—–+
\n|<\/span> 3<\/span>^5 |<\/span>
\n+—–+
\n|<\/span> 6<\/span> |<\/span>
\n+—–+
\n1<\/span> row in<\/span> set<\/span> (<\/span>0.00<\/span> sec)<\/span><\/p>\n

(5).<<\u6309\u4f4d\u5de6\u79fb(3\u5411\u5de6\u79fb\u4e24\u4f4d)<\/p>\n

select<\/span> 3<\/span><<\/span><<\/span>2<\/span>;<\/span>
\n\u8fd0\u7b97\u7ed3\u679c
\n+——+
\n|<\/span> 3<\/span><<\/span><<\/span>2<\/span> |<\/span>
\n+——+
\n|<\/span> 12<\/span> |<\/span>
\n+——+
\n1<\/span> row in<\/span> set<\/span> (<\/span>0.00<\/span> sec)<\/span><\/p>\n

(6).>>\u6309\u4f4d\u53f3\u79fb（3\u5411\u53f3\u79fb2\u4f4d）<\/p>\n

select<\/span> 3<\/span>>><\/span>2<\/span>;<\/span>
\n\u8fd0\u7b97\u7ed3\u679c
\n+——+
\n|<\/span> 3<\/span>>><\/span>2<\/span> |<\/span>
\n+——+
\n|<\/span> 0<\/span> |<\/span>
\n+——+
\n1<\/span> row in<\/span> set<\/span> (<\/span>0.00<\/span> sec)<\/span><\/p>\n

5.\u8868\u8fbe\u5f0f\u548c\u8fd0\u7b97\u7b26\u7684\u4f18\u5148\u7ea7<\/h3>\n

\u4ee5\u4e0b\u662fMySQL\u4e2d\u8fd0\u7b97\u7b26\u7684\u4f18\u5148\u7ea7，\u4ece\u9ad8\u5230\u4f4e\u6392\u5217：<\/p>\n

  • \n

    !（\u903b\u8f91\u975e）\u3001BINARY\u3001COLLATE<\/p>\n<\/li>\n

  • \n

    -（\u4e00\u5143\u8d1f\u53f7）\u3001~（\u6309\u4f4d\u53d6\u53cd）<\/p>\n<\/li>\n

  • \n

    ^（\u6309\u4f4d\u5f02\u6216）<\/p>\n<\/li>\n

  • \n

    *（\u4e58\u6cd5）\u3001\/（\u9664\u6cd5）\u3001DIV（\u6574\u9664）\u3001% \u6216 MOD（\u53d6\u4f59）<\/p>\n<\/li>\n

  • \n

    +（\u52a0\u6cd5）\u3001-（\u51cf\u6cd5）<\/p>\n<\/li>\n

  • \n

    <<（\u5de6\u79fb）\u3001>>（\u53f3\u79fb）<\/p>\n<\/li>\n

  • \n

    &（\u6309\u4f4d\u4e0e）<\/p>\n<\/li>\n

  • \n

    |（\u6309\u4f4d\u6216）<\/p>\n<\/li>\n

  • \n

    =（\u6bd4\u8f83）\u3001<=>（\u5b89\u5168\u7b49\u4e8e）\u3001>=\u3001>\u3001<=\u3001<\u3001<> \u6216 !=（\u4e0d\u7b49\u4e8e）\u3001IS\u3001LIKE\u3001REGEXP\u3001IN<\/p>\n<\/li>\n

  • \n

    BETWEEN\u3001CASE\u3001WHEN\u3001THEN\u3001ELSE<\/p>\n<\/li>\n

  • \n

    NOT<\/p>\n<\/li>\n

  • \n

    AND \u6216 &&<\/p>\n<\/li>\n

  • \n

    XOR<\/p>\n<\/li>\n

  • \n

    OR \u6216 ||<\/p>\n<\/li>\n

  • \n

    =（\u8d4b\u503c）\u3001:=<\/p>\n<\/li>\n","protected":false},"excerpt":{"rendered":"

    1.\u7b97\u672f\u8fd0\u7b97\u7b26
    \n(1).＋\u52a0\u6cd5\u8fd0\u7b97
    \nselect 53;\u8fd0\u7b97\u7ed3\u679c
    \n—–
    \n| 35 |
    \n—–
    \n| 8 |
    \n—–
    \n1 row in set (0.01 sec)(2).- \u51cf\u6cd5\u8fd0\u7b97select 5-3-2;\u8fd0\u7b97\u7ed3\u679c
    \n——-
    \n| 5-3-2 |
    \n——-
    \n| 0 |
    \n——-
    \n1 row in set (0.00 sec)(3).*\u4e58\u6cd5\u8fd0\u7b97
    \nselect 3*5;
    \n\u8fd0\u7b97\u7ed3\u679c
    \n—–
    \n| 3*5 |
    \n—–
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