{"id":717,"date":"2020-07-22T10:15:42","date_gmt":"2020-07-22T02:15:42","guid":{"rendered":"https:\/\/raksmart.cn\/blog\/?p=717"},"modified":"2020-07-24T10:01:05","modified_gmt":"2020-07-24T02:01:05","slug":"%e6%93%8d%e4%bd%9c-mysql-%e6%95%b0%e6%8d%ae%e5%ba%93","status":"publish","type":"post","link":"https:\/\/raksmart.cn\/blog\/knowledge\/717.html","title":{"rendered":"\u600e\u4e48\u64cd\u4f5cMySQL\u6570\u636e\u5e93"},"content":{"rendered":"\n

\u4f5c\u4e3a\u4e00\u540d\u7f51\u7ad9\u4f18\u5316\u4eba\u5458\uff0c\u6211\u4eec\u6240\u9700\u8981\u5b66\u4e60\u7684\u77e5\u8bc6\u8fd8\u662f\u6bd4\u8f83\u5168\u9762\u7684\uff0c\u50cf\u4e00\u4e9b\u6570\u636e\u5e93\u548c\u6b63\u5219\u8868\u8fbe\u7b49\uff0c\u4f46\u662f\u8fd9\u4e9b\u5e76\u4e0d\u7528\u5b66\u7cbe\uff0c\u6709\u4e2a\u57fa\u672c\u7684\u4e86\u89e3\u5373\u53ef\uff0c\u4e0b\u9762\u4e00\u8d77\u548cRaksmart\u7f8e\u56fd\u670d\u52a1\u5668<\/a><\/strong>\u5c0f\u7f16\u770b\u770b\u76f8\u5173\u7684\u4ecb\u7ecd\u5427\u3002<\/p>\n\n\n\n

\u5411\u8868\u4e2d\u63d2\u5165\u6570\u636e<\/p>\n\n\n\n

insert \u8bed\u53e5\u53ef\u4ee5\u7528\u6765\u5c06\u4e00\u884c\u6216\u591a\u884c\u6570\u636e\u63d2\u5230\u6570\u636e\u5e93\u8868\u4e2d, \u4f7f\u7528\u7684\u4e00\u822c\u5f62\u5f0f\u5982\u4e0b:<\/p>\n\n\n\n

insert [into] \u8868\u540d [(\u5217\u540d1, \u5217\u540d2, \u5217\u540d3, …)] values (\u503c1, \u503c2, \u503c3, …);<\/p>\n\n\n\n

\u5176\u4e2d [] \u5185\u7684\u5185\u5bb9\u662f\u53ef\u9009\u7684, \u4f8b\u5982, \u8981\u7ed9 samp_db \u6570\u636e\u5e93\u4e2d\u7684 students \u8868\u63d2\u5165\u4e00\u6761\u8bb0\u5f55, \u6267\u884c\u8bed\u53e5:<\/p>\n\n\n\n

insert into students values(NULL, “\u738b\u521a”, “\u7537”, 20, “13811371377”);<\/p>\n\n\n\n

\u6309\u56de\u8f66\u952e\u786e\u8ba4\u540e\u82e5\u63d0\u793a Query Ok, 1 row affected (0.05 sec) \u8868\u793a\u6570\u636e\u63d2\u5165\u6210\u529f\u3002\n\u82e5\u63d2\u5165\u5931\u8d25\u8bf7\u68c0\u67e5\u662f\u5426\u5df2\u9009\u62e9\u9700\u8981\u64cd\u4f5c\u7684\u6570\u636e\u5e93\u3002<\/p>\n\n\n\n

\u6709\u65f6\u6211\u4eec\u53ea\u9700\u8981\u63d2\u5165\u90e8\u5206\u6570\u636e, \u6216\u8005\u4e0d\u6309\u7167\u5217\u7684\u987a\u5e8f\u8fdb\u884c\u63d2\u5165, \u53ef\u4ee5\u4f7f\u7528\u8fd9\u6837\u7684\u5f62\u5f0f\u8fdb\u884c\u63d2\u5165:<\/p>\n\n\n\n

insert into students (name, sex, age)\nvalues(“\u5b59\u4e3d\u534e”, “\u5973”, 21);<\/p>\n\n\n\n

\u67e5\u8be2\u8868\u4e2d\u7684\u6570\u636e<\/p>\n\n\n\n

select \u8bed\u53e5\u5e38\u7528\u6765\u6839\u636e\u4e00\u5b9a\u7684\u67e5\u8be2\u89c4\u5219\u5230\u6570\u636e\u5e93\u4e2d\u83b7\u53d6\u6570\u636e, \u5176\u57fa\u672c\u7684\u7528\u6cd5\u4e3a:<\/p>\n\n\n\n

select \u5217\u540d\u79f0 from \u8868\u540d\u79f0 [\u67e5\u8be2\u6761\u4ef6];<\/p>\n\n\n\n

\u4f8b\u5982\u8981\u67e5\u8be2 students \u8868\u4e2d\u6240\u6709\u5b66\u751f\u7684\u540d\u5b57\u548c\u5e74\u9f84, \u8f93\u5165\u8bed\u53e5 select name, age from students; \u6267\u884c\u7ed3\u679c\u5982\u4e0b:<\/p>\n\n\n\n

   \nmysql> select name, age from students;<\/p>\n\n\n\n

   \n+——–+—–+<\/p>\n\n\n\n

    |\nname   | age |<\/p>\n\n\n\n

   \n+——–+—–+<\/p>\n\n\n\n

    |\n\u738b\u521a   |  20\n|<\/p>\n\n\n\n

    |\n\u5b59\u4e3d\u534e |  21 |<\/p>\n\n\n\n

    |\n\u738b\u6c38\u6052 |  23 |<\/p>\n\n\n\n

    |\n\u90d1\u4fca\u6770 |  19 |<\/p>\n\n\n\n

    |\n\u9648\u82b3   |  22\n|<\/p>\n\n\n\n

    |\n\u5f20\u4f1f\u670b |  21 |<\/p>\n\n\n\n

   \n+——–+—–+<\/p>\n\n\n\n

    6\nrows in set (0.00 sec)<\/p>\n\n\n\n

   \nmysql><\/p>\n\n\n\n

\u4e5f\u53ef\u4ee5\u4f7f\u7528\u901a\u914d\u7b26\n\u67e5\u8be2\u8868\u4e2d\u6240\u6709\u7684\u5185\u5bb9, \u8bed\u53e5: select from students;<\/p>\n\n\n\n

\u6309\u7279\u5b9a\u6761\u4ef6\u67e5\u8be2<\/p>\n\n\n\n

where \u5173\u952e\u8bcd\u7528\u4e8e\u6307\u5b9a\u67e5\u8be2\u6761\u4ef6, \u7528\u6cd5\u5f62\u5f0f\u4e3a: select \u5217\u540d\u79f0 from \u8868\u540d\u79f0 where \u6761\u4ef6;<\/p>\n\n\n\n

\u4ee5\u67e5\u8be2\u6240\u6709\u6027\u522b\u4e3a\u5973\u7684\u4fe1\u606f\u4e3a\u4f8b, \u8f93\u5165\u67e5\u8be2\u8bed\u53e5: select * from students where sex=”\u5973”;<\/p>\n\n\n\n

where \u5b50\u53e5\u4e0d\u4ec5\u4ec5\u652f\u6301 “where \u5217\u540d = \u503c” \u8fd9\u79cd\u540d\u7b49\u4e8e\u503c\u7684\u67e5\u8be2\u5f62\u5f0f, \u5bf9\u4e00\u822c\u7684\u6bd4\u8f83\u8fd0\u7b97\u7684\u8fd0\u7b97\u7b26\u90fd\u662f\u652f\u6301\u7684, \u4f8b\u5982 =\u3001>\u3001<\u3001>=\u3001<\u3001!= \u4ee5\u53ca\u4e00\u4e9b\u6269\u5c55\u8fd0\u7b97\u7b26 is [not] null\u3001in\u3001like \u7b49\u7b49\u3002 \u8fd8\u53ef\u4ee5\u5bf9\u67e5\u8be2\u6761\u4ef6\u4f7f\u7528 or \u548c and \u8fdb\u884c\u7ec4\u5408\u67e5\u8be2, \u4ee5\u540e\u8fd8\u4f1a\u5b66\u5230\u66f4\u52a0\u9ad8\u7ea7\u7684\u6761\u4ef6\u67e5\u8be2\u65b9\u5f0f, \u8fd9\u91cc\u4e0d\u518d\u591a\u505a\u4ecb\u7ecd\u3002<\/p>\n\n\n\n

\u793a\u4f8b:<\/p>\n\n\n\n

\u67e5\u8be2\u5e74\u9f84\u5728 21 \u5c81\u4ee5\u4e0a\u7684\u6240\u6709\u4eba\u4fe1\u606f: select * from students where age > 21;<\/p>\n\n\n\n

\u67e5\u8be2\u540d\u5b57\u4e2d\u5e26\u6709 “\u738b” \u5b57\u7684\u6240\u6709\u4eba\u4fe1\u606f: select * from students where name like “%\u738b%”;<\/p>\n\n\n\n

\u67e5\u8be2 id \u5c0f\u4e8e 5 \u4e14\u5e74\u9f84\u5927\u4e8e 20 \u7684\u6240\u6709\u4eba\u4fe1\u606f: select * from students where id<5 and age>20;<\/p>\n\n\n\n

\u66f4\u65b0\u8868\u4e2d\u7684\u6570\u636e<\/p>\n\n\n\n

update \u8bed\u53e5\u53ef\u7528\u6765\u4fee\u6539\u8868\u4e2d\u7684\u6570\u636e, \u57fa\u672c\u7684\u4f7f\u7528\u5f62\u5f0f\u4e3a:<\/p>\n\n\n\n

update \u8868\u540d\u79f0 set \u5217\u540d\u79f0=\u65b0\u503c where \u66f4\u65b0\u6761\u4ef6;<\/p>\n\n\n\n

\u4f7f\u7528\u793a\u4f8b:<\/p>\n\n\n\n

\u5c06 id \u4e3a 5 \u7684\u624b\u673a\u53f7\u6539\u4e3a\u9ed8\u8ba4\u7684”-“:update students set tel=default where id=5;<\/p>\n\n\n\n

\u5c06\u6240\u6709\u4eba\u7684\u5e74\u9f84\u589e\u52a0 1: update students set age=age+1;<\/p>\n\n\n\n

\u5c06\u624b\u673a\u53f7\u4e3a 13288097888 \u7684\u59d3\u540d\u6539\u4e3a “\u5f20\u4f1f\u9e4f”, \u5e74\u9f84\u6539\u4e3a 19: update students set name=”\u5f20\u4f1f\u9e4f”, age=19 where tel=”13288097888″;<\/p>\n\n\n\n

\u5220\u9664\u8868\u4e2d\u7684\u6570\u636e<\/p>\n\n\n\n

delete \u8bed\u53e5\u7528\u4e8e\u5220\u9664\u8868\u4e2d\u7684\u6570\u636e, \u57fa\u672c\u7528\u6cd5\u4e3a:<\/p>\n\n\n\n

delete from \u8868\u540d\u79f0 where \u5220\u9664\u6761\u4ef6;<\/p>\n\n\n\n

\u4f7f\u7528\u793a\u4f8b:<\/p>\n\n\n\n

\u5220\u9664 id \u4e3a 2 \u7684\u884c: delete from students where id=2;<\/p>\n\n\n\n

\u5220\u9664\u6240\u6709\u5e74\u9f84\u5c0f\u4e8e 21 \u5c81\u7684\u6570\u636e: delete from students where age<20;<\/p>\n\n\n\n

\u5220\u9664\u8868\u4e2d\u7684\u6240\u6709\u6570\u636e: delete from students;\u66f4\u591a\u7684\u76f8\u5173\u5185\u5bb9\u53ef\u4ee5\u9605\u8bfb\u4ec0\u4e48\u662fMYSQL\u6570\u636e\u5e93<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

\u4f5c\u4e3a\u4e00\u540d\u7f51\u7ad9\u4f18\u5316\u4eba\u5458\uff0c\u6211\u4eec\u6240\u9700\u8981\u5b66\u4e60\u7684\u77e5\u8bc6\u8fd8\u662f\u6bd4\u8f83\u5168\u9762\u7684\uff0c\u50cf\u4e00\u4e9b\u6570\u636e\u5e93\u548c\u6b63\u5219\u8868\u8fbe\u7b49\uff0c\u4f46\u662f\u8fd9\u4e9b\u5e76\u4e0d\u7528\u5b66… \u7ee7\u7eed\u9605\u8bfb \u600e\u4e48\u64cd\u4f5cMySQL\u6570\u636e\u5e93<\/span><\/i><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[6],"tags":[107],"aioseo_notices":[],"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/raksmart.cn\/blog\/wp-json\/wp\/v2\/posts\/717"}],"collection":[{"href":"https:\/\/raksmart.cn\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/raksmart.cn\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/raksmart.cn\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/raksmart.cn\/blog\/wp-json\/wp\/v2\/comments?post=717"}],"version-history":[{"count":4,"href":"https:\/\/raksmart.cn\/blog\/wp-json\/wp\/v2\/posts\/717\/revisions"}],"predecessor-version":[{"id":724,"href":"https:\/\/raksmart.cn\/blog\/wp-json\/wp\/v2\/posts\/717\/revisions\/724"}],"wp:attachment":[{"href":"https:\/\/raksmart.cn\/blog\/wp-json\/wp\/v2\/media?parent=717"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/raksmart.cn\/blog\/wp-json\/wp\/v2\/categories?post=717"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/raksmart.cn\/blog\/wp-json\/wp\/v2\/tags?post=717"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}