{"id":239,"date":"2023-02-24T05:59:31","date_gmt":"2023-02-23T21:59:31","guid":{"rendered":"https:\/\/www.appblog.cn\/?p=239"},"modified":"2023-04-30T15:20:44","modified_gmt":"2023-04-30T07:20:44","slug":"mysql-regular-expressions","status":"publish","type":"post","link":"https:\/\/www.appblog.cn\/index.php\/2023\/02\/24\/mysql-regular-expressions\/","title":{"rendered":"MySQL \u6b63\u5219\u8868\u8fbe\u5f0f"},"content":{"rendered":"

\u6211\u4eec\u5df2\u7ecf\u4e86\u89e3\u5230MySQL\u53ef\u4ee5\u901a\u8fc7LIKE ...%<\/code>\u6765\u8fdb\u884c\u6a21\u7cca\u5339\u914d\u3002<\/p>\n

MySQL\u540c\u6837\u4e5f\u652f\u6301\u5176\u4ed6\u6b63\u5219\u8868\u8fbe\u5f0f\u7684\u5339\u914d\uff0cMySQL\u4e2d\u4f7f\u7528REGEXP<\/code>\u64cd\u4f5c\u7b26\u6765\u8fdb\u884c\u6b63\u5219\u8868\u8fbe\u5f0f\u5339\u914d\u3002<\/p>\n

\u4e0b\u8868\u4e2d\u7684\u6b63\u5219\u6a21\u5f0f\u53ef\u5e94\u7528\u4e8eREGEXP<\/code>\u64cd\u4f5c\u7b26\u4e2d<\/p>\n

<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\u6a21\u5f0f<\/th>\n\u63cf\u8ff0<\/th>\n<\/tr>\n<\/thead>\n
^<\/code><\/td>\n\u5339\u914d\u8f93\u5165\u5b57\u7b26\u4e32\u7684\u5f00\u59cb\u4f4d\u7f6e\u3002
\u5982\u679c\u8bbe\u7f6e\u4e86 RegExp \u5bf9\u8c61\u7684 Multiline \u5c5e\u6027\uff0c^<\/code>\u4e5f\u5339\u914d\\n<\/code>\u6216\\r<\/code>\u4e4b\u540e\u7684\u4f4d\u7f6e<\/td>\n<\/tr>\n
$<\/code><\/td>\n\u5339\u914d\u8f93\u5165\u5b57\u7b26\u4e32\u7684\u7ed3\u675f\u4f4d\u7f6e\u3002
\u5982\u679c\u8bbe\u7f6e\u4e86RegExp \u5bf9\u8c61\u7684 Multiline \u5c5e\u6027\uff0c$ \u4e5f\u5339\u914d\\n<\/code>\u6216\\r<\/code>\u4e4b\u524d\u7684\u4f4d\u7f6e<\/td>\n<\/tr>\n
.<\/code><\/td>\n\u5339\u914d\u9664\\n<\/code>\u4e4b\u5916\u7684\u4efb\u4f55\u5355\u4e2a\u5b57\u7b26\u3002
\u8981\u5339\u914d\u5305\u62ec\\n<\/code>\u5728\u5185\u7684\u4efb\u4f55\u5b57\u7b26\uff0c\u8bf7\u4f7f\u7528\u50cf[.\\n]<\/code>\u7684\u6a21\u5f0f<\/td>\n<\/tr>\n
[...]<\/code><\/td>\n\u5b57\u7b26\u96c6\u5408\u3002\u5339\u914d\u6240\u5305\u542b\u7684\u4efb\u610f\u4e00\u4e2a\u5b57\u7b26\u3002
\u4f8b\u5982\uff0c[abc]<\/code>\u53ef\u4ee5\u5339\u914dplain<\/code>\u4e2d\u7684a<\/code><\/td>\n<\/tr>\n
[^...]<\/code><\/td>\n\u8d1f\u503c\u5b57\u7b26\u96c6\u5408\u3002\u5339\u914d\u672a\u5305\u542b\u7684\u4efb\u610f\u5b57\u7b26\u3002
\u4f8b\u5982\uff0c[^abc]<\/code>\u53ef\u4ee5\u5339\u914dplain<\/code>\u4e2d\u7684p<\/code><\/td>\n<\/tr>\n
p1\\|p2\\|p3<\/code><\/td>\n\u5339\u914d p1 \u6216 p2 \u6216 p3\u3002
\u4f8b\u5982\uff0cz\\|food<\/code> \u80fd\u5339\u914dz<\/code>\u6216food<\/code>\uff1b(z\\|f)ood<\/code>\u5219\u5339\u914dzood<\/code>\u6216food<\/code><\/td>\n<\/tr>\n
*<\/code><\/td>\n\u5339\u914d\u524d\u9762\u7684\u5b50\u8868\u8fbe\u5f0f\u96f6\u6b21\u6216\u591a\u6b21\u3002
\u4f8b\u5982\uff0czo*<\/code>\u80fd\u5339\u914dz<\/code>\u4ee5\u53cazoo<\/code>\u3002*<\/code>\u7b49\u4ef7\u4e8e{0,}<\/code><\/td>\n<\/tr>\n
+<\/code><\/td>\n\u5339\u914d\u524d\u9762\u7684\u5b50\u8868\u8fbe\u5f0f\u4e00\u6b21\u6216\u591a\u6b21\u3002
\u4f8b\u5982\uff0czo+<\/code>\u80fd\u5339\u914dzo<\/code>\u4ee5\u53cazoo<\/code>\uff0c\u4f46\u4e0d\u80fd\u5339\u914dz<\/code>\u3002+ \u7b49\u4ef7\u4e8e{1,}<\/code><\/td>\n<\/tr>\n
{n}<\/code><\/td>\nn<\/code>\u662f\u4e00\u4e2a\u975e\u8d1f\u6574\u6570\u3002\u5339\u914d\u786e\u5b9a\u7684n<\/code>\u6b21\u3002
\u4f8b\u5982\uff1ao{2}<\/code>\u4e0d\u80fd\u5339\u914dBob<\/code>\u4e2d\u7684o<\/code>\uff0c\u4f46\u662f\u80fd\u5339\u914dfood<\/code>\u4e2d\u7684\u4e24\u4e2a o<\/td>\n<\/tr>\n
{n,m}<\/code><\/td>\nm<\/code>\u548cn<\/code>\u5747\u4e3a\u975e\u8d1f\u6574\u6570\uff0c\u5176\u4e2dn <= m<\/code>\u3002
\u6700\u5c11\u5339\u914dn<\/code>\u6b21\u4e14\u6700\u591a\u5339\u914dm<\/code>\u6b21<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u4f7f\u7528\u5b9e\u4f8b<\/h2>\n

\u4e86\u89e3\u4ee5\u4e0a\u7684\u6b63\u5219\u9700\u6c42\u540e\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u6839\u636e\u81ea\u5df1\u7684\u9700\u6c42\u6765\u7f16\u5199\u5e26\u6709\u6b63\u5219\u8868\u8fbe\u5f0f\u7684SQL\u8bed\u53e5\u3002\u4ee5\u4e0b\u5217\u51fa\u51e0\u4e2a\u5c0f\u5b9e\u4f8b(\u8868\u540d\uff1aperson_tbl<\/code>)\u6765\u52a0\u6df1\u6211\u4eec\u7684\u7406\u89e3\uff1a<\/p>\n

\u67e5\u627ename\u5b57\u6bb5\u4e2d\u4ee5’st’\u4e3a\u5f00\u5934\u7684\u6240\u6709\u6570\u636e\uff1a<\/p>\n

mysql> SELECT name FROM person_tbl WHERE name REGEXP '^st';<\/code><\/pre>\n
\u67e5\u627ename\u5b57\u6bb5\u4e2d\u4ee5’ok’\u4e3a\u7ed3\u5c3e\u7684\u6240\u6709\u6570\u636e\uff1a<\/p>\n
mysql> SELECT name FROM person_tbl WHERE name REGEXP 'ok$';<\/code><\/pre>\n
\u67e5\u627ename\u5b57\u6bb5\u4e2d\u5305\u542b’mar’\u5b57\u7b26\u4e32\u7684\u6240\u6709\u6570\u636e\uff1a<\/p>\n
mysql> SELECT name FROM person_tbl WHERE name REGEXP 'mar';<\/code><\/pre>\n
\u67e5\u627ename\u5b57\u6bb5\u4e2d\u4ee5\u5143\u97f3\u5b57\u7b26\u5f00\u5934\u6216\u4ee5’ok’\u5b57\u7b26\u4e32\u7ed3\u5c3e\u7684\u6240\u6709\u6570\u636e\uff1a<\/p>\n
mysql> SELECT name FROM person_tbl WHERE name REGEXP '^[aeiou]|ok$';<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
\u6211\u4eec\u5df2\u7ecf\u4e86\u89e3\u5230MySQL\u53ef\u4ee5\u901a\u8fc7LIKE …%\u6765\u8fdb\u884c\u6a21\u7cca\u5339\u914d\u3002 MySQL\u540c\u6837\u4e5f\u652f\u6301\u5176\u4ed6\u6b63\u5219\u8868\u8fbe\u5f0f\u7684\u5339\u914d\uff0c […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[13],"tags":[],"class_list":["post-239","post","type-post","status-publish","format-standard","hentry","category-mysql"],"_links":{"self":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts\/239","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/comments?post=239"}],"version-history":[{"count":0,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts\/239\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/media?parent=239"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/categories?post=239"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/tags?post=239"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}