{"id":75638,"date":"2024-10-15T23:58:28","date_gmt":"2024-10-15T15:58:28","guid":{"rendered":"https:\/\/server.hk\/cnblog\/75638\/"},"modified":"2024-10-15T23:58:28","modified_gmt":"2024-10-15T15:58:28","slug":"mysql-%e7%b4%a2%e5%bc%95%e5%a4%b1%e6%95%88%e7%9a%84%e5%b9%be%e7%a8%ae%e9%a1%9e%e5%9e%8b%e4%bb%a5%e5%8f%8a%e8%a7%a3%e6%b1%ba%e6%96%b9%e5%bc%8f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/75638\/","title":{"rendered":"MySQL \u7d22\u5f15\u5931\u6548\u7684\u5e7e\u7a2e\u985e\u578b\u4ee5\u53ca\u89e3\u6c7a\u65b9\u5f0f"},"content":{"rendered":"

MySQL \u7d22\u5f15\u5931\u6548\u7684\u5e7e\u7a2e\u985e\u578b\u4ee5\u53ca\u89e3\u6c7a\u65b9\u5f0f<\/h1>\n

\u5728\u4f7f\u7528 MySQL \u6578\u64da\u5eab\u6642\uff0c\u7d22\u5f15\u662f\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u7684\u91cd\u8981\u5de5\u5177\u3002\u7136\u800c\uff0c\u7d22\u5f15\u7684\u5931\u6548\u6703\u5c0e\u81f4\u67e5\u8a62\u6027\u80fd\u4e0b\u964d\uff0c\u751a\u81f3\u5f71\u97ff\u6574\u9ad4\u7cfb\u7d71\u7684\u6548\u7387\u3002\u672c\u6587\u5c07\u63a2\u8a0e MySQL \u7d22\u5f15\u5931\u6548\u7684\u5e7e\u7a2e\u985e\u578b\u53ca\u5176\u89e3\u6c7a\u65b9\u5f0f\uff0c\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u597d\u5730\u512a\u5316\u6578\u64da\u5eab\u6027\u80fd\u3002<\/p>\n

\u7d22\u5f15\u5931\u6548\u7684\u985e\u578b<\/h2>\n

1. \u4e0d\u4f7f\u7528\u7d22\u5f15\u7684\u67e5\u8a62<\/h3>\n

\u7576\u67e5\u8a62\u689d\u4ef6\u4e0d\u7b26\u5408\u7d22\u5f15\u7684\u4f7f\u7528\u689d\u4ef6\u6642\uff0cMySQL \u53ef\u80fd\u6703\u9078\u64c7\u4e0d\u4f7f\u7528\u7d22\u5f15\u3002\u4f8b\u5982\uff0c\u5c0d\u65bc\u4e00\u500b\u6709\u7d22\u5f15\u7684\u5217\uff0c\u5982\u679c\u67e5\u8a62\u4e2d\u4f7f\u7528\u4e86\u4e0d\u7b49\u65bc\uff08\uff09\u6216 LIKE \u64cd\u4f5c\u7b26\uff0c\u5247\u53ef\u80fd\u5c0e\u81f4\u7d22\u5f15\u5931\u6548\u3002<\/p>\n

SELECT * FROM users WHERE age  30;<\/code><\/pre>\n
\u5728\u9019\u7a2e\u60c5\u6cc1\u4e0b\uff0cMySQL \u6703\u9032\u884c\u5168\u8868\u6383\u63cf\uff0c\u5f9e\u800c\u5f71\u97ff\u6027\u80fd\u3002<\/p>\n
2. \u7d22\u5f15\u9078\u64c7\u6027\u5dee<\/h3>\n
\u7d22\u5f15\u7684\u9078\u64c7\u6027\u662f\u6307\u7d22\u5f15\u4e2d\u552f\u4e00\u503c\u7684\u6bd4\u4f8b\u3002\u5982\u679c\u7d22\u5f15\u7684\u9078\u64c7\u6027\u8f03\u4f4e\uff0c\u5247\u53ef\u80fd\u5c0e\u81f4 MySQL \u9078\u64c7\u4e0d\u4f7f\u7528\u8a72\u7d22\u5f15\u3002\u4f8b\u5982\uff0c\u5c0d\u65bc\u6027\u5225\u9019\u4e00\u5217\uff0c\u56e0\u70ba\u53ea\u6709\u5169\u500b\u53ef\u80fd\u7684\u503c\uff08\u7537\u3001\u5973\uff09\uff0c\u6240\u4ee5\u5176\u9078\u64c7\u6027\u8f03\u5dee\u3002<\/p>\n
SELECT * FROM users WHERE gender = 'male';<\/code><\/pre>\n
\u5728\u9019\u7a2e\u60c5\u6cc1\u4e0b\uff0cMySQL \u53ef\u80fd\u6703\u9078\u64c7\u5168\u8868\u6383\u63cf\u800c\u975e\u4f7f\u7528\u7d22\u5f15\u3002<\/p>\n
3. \u4f7f\u7528\u4e86\u51fd\u6578\u6216\u8868\u9054\u5f0f<\/h3>\n
\u5982\u679c\u5728\u67e5\u8a62\u4e2d\u5c0d\u7d22\u5f15\u5217\u4f7f\u7528\u4e86\u51fd\u6578\u6216\u8868\u9054\u5f0f\uff0c\u5247\u7d22\u5f15\u4e5f\u53ef\u80fd\u5931\u6548\u3002\u4f8b\u5982\uff1a<\/p>\n
SELECT * FROM users WHERE YEAR(birthdate) = 1990;<\/code><\/pre>\n
\u9019\u6a23\u7684\u67e5\u8a62\u6703\u5c0e\u81f4 MySQL \u7121\u6cd5\u4f7f\u7528 birthdate \u5217\u7684\u7d22\u5f15\u3002<\/p>\n
4. \u7d22\u5f15\u5217\u7684\u6578\u64da\u985e\u578b\u4e0d\u5339\u914d<\/h3>\n
\u7576\u67e5\u8a62\u689d\u4ef6\u4e2d\u7684\u6578\u64da\u985e\u578b\u8207\u7d22\u5f15\u5217\u7684\u6578\u64da\u985e\u578b\u4e0d\u5339\u914d\u6642\uff0c\u7d22\u5f15\u4e5f\u53ef\u80fd\u5931\u6548\u3002\u4f8b\u5982\uff0c\u5982\u679c\u7d22\u5f15\u5217\u662f\u6574\u6578\u985e\u578b\uff0c\u800c\u67e5\u8a62\u4e2d\u4f7f\u7528\u4e86\u5b57\u7b26\u4e32\u985e\u578b\u7684\u689d\u4ef6\uff1a<\/p>\n
SELECT * FROM users WHERE id = '1';<\/code><\/pre>\n
\u9019\u6a23\u7684\u67e5\u8a62\u53ef\u80fd\u5c0e\u81f4 MySQL \u9032\u884c\u5168\u8868\u6383\u63cf\u3002<\/p>\n
\u89e3\u6c7a\u65b9\u5f0f<\/h2>\n
1. \u512a\u5316\u67e5\u8a62\u689d\u4ef6<\/h3>\n
\u70ba\u4e86\u907f\u514d\u4e0d\u4f7f\u7528\u7d22\u5f15\u7684\u67e5\u8a62\uff0c\u958b\u767c\u8005\u61c9\u8a72\u512a\u5316\u67e5\u8a62\u689d\u4ef6\uff0c\u76e1\u91cf\u4f7f\u7528\u7b49\u65bc\uff08=\uff09\u64cd\u4f5c\u7b26\uff0c\u4e26\u907f\u514d\u4f7f\u7528\u4e0d\u7b49\u65bc\uff08\uff09\u6216 LIKE \u64cd\u4f5c\u7b26\u3002<\/p>\n
2. \u63d0\u9ad8\u7d22\u5f15\u9078\u64c7\u6027<\/h3>\n
\u5c0d\u65bc\u9078\u64c7\u6027\u5dee\u7684\u7d22\u5f15\uff0c\u53ef\u4ee5\u8003\u616e\u5408\u4f75\u591a\u500b\u5217\u4f86\u5275\u5efa\u8907\u5408\u7d22\u5f15\uff0c\u5f9e\u800c\u63d0\u9ad8\u67e5\u8a62\u7684\u6548\u7387\u3002\u4f8b\u5982\uff1a<\/p>\n
CREATE INDEX idx_gender_age ON users (gender, age);<\/code><\/pre>\n
3. \u907f\u514d\u4f7f\u7528\u51fd\u6578\u6216\u8868\u9054\u5f0f<\/h3>\n
\u5728\u67e5\u8a62\u4e2d\u907f\u514d\u5c0d\u7d22\u5f15\u5217\u4f7f\u7528\u51fd\u6578\u6216\u8868\u9054\u5f0f\uff0c\u61c9\u76f4\u63a5\u4f7f\u7528\u539f\u59cb\u6578\u64da\u9032\u884c\u67e5\u8a62\u3002\u4f8b\u5982\uff1a<\/p>\n
SELECT * FROM users WHERE birthdate BETWEEN '1990-01-01' AND '1990-12-31';<\/code><\/pre>\n
4. \u78ba\u4fdd\u6578\u64da\u985e\u578b\u5339\u914d<\/h3>\n
\u5728\u67e5\u8a62\u6642\uff0c\u78ba\u4fdd\u4f7f\u7528\u7684\u6578\u64da\u985e\u578b\u8207\u7d22\u5f15\u5217\u7684\u6578\u64da\u985e\u578b\u4e00\u81f4\uff0c\u4ee5\u907f\u514d\u7d22\u5f15\u5931\u6548\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
MySQL \u7d22\u5f15\u5931\u6548\u53ef\u80fd\u6703\u5c0d\u67e5\u8a62\u6027\u80fd\u9020\u6210\u986f\u8457\u5f71\u97ff\uff0c\u4e86\u89e3\u5176\u985e\u578b\u53ca\u89e3\u6c7a\u65b9\u5f0f\u5c0d\u65bc\u6578\u64da\u5eab\u7684\u512a\u5316\u81f3\u95dc\u91cd\u8981\u3002\u901a\u904e\u512a\u5316\u67e5\u8a62\u689d\u4ef6\u3001\u63d0\u9ad8\u7d22\u5f15\u9078\u64c7\u6027\u3001\u907f\u514d\u4f7f\u7528\u51fd\u6578\u6216\u8868\u9054\u5f0f\u4ee5\u53ca\u78ba\u4fdd\u6578\u64da\u985e\u578b\u5339\u914d\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u6e1b\u5c11\u7d22\u5f15\u5931\u6548\u7684\u60c5\u6cc1\u3002\u82e5\u60a8\u9700\u8981\u9032\u4e00\u6b65\u4e86\u89e3\u5982\u4f55\u5728 \u9999\u6e2fVPS<\/a> \u4e0a\u512a\u5316 MySQL \u6578\u64da\u5eab\u6027\u80fd\uff0c\u8acb\u96a8\u6642\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u8cc7\u8a0a\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u4e86\u89e3 MySQL \u7d22\u5f15\u5931\u6548\u7684\u5e7e\u7a2e\u985e\u578b\u53ca\u5176\u89e3\u6c7a\u65b9\u5f0f\uff0c\u63d0\u5347\u67e5\u8a62\u6548\u7387\uff0c\u512a\u5316\u6578\u64da\u5eab\u6027\u80fd\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-75638","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/75638","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=75638"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/75638\/revisions"}],"predecessor-version":[{"id":75639,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/75638\/revisions\/75639"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=75638"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=75638"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=75638"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}