PostgreSQL substring()函数

发布时间：2020-12-13 17:55:24 所属栏目：百科来源：网络整理

导读：substring ( string [ from int ] [ for int ]) text 抽取子字串 substring('Thomas' from 2 for 3) hom substring ( string from pattern ) text 抽取匹配 POSIX 正则表达式的子字串 substring('Thomas' from '...$') mas substring ( string from pattern

`substring`(`string` [from `int`] [for `int`])	`text`	抽取子字串	`substring('Thomas' from 2 for 3)`	`hom`
`substring(string from pattern)`	`text`	抽取匹配 POSIX 正则表达式的子字串	`substring('Thomas' from '...$')`	`mas`
`substring`(`string` from `pattern` for `escape`)	`text`	抽取匹配SQL正则表达式的子字串	`substring('Thomas' from '%#"o_a#"_' for '#')`	`oma`

例子1.

SELECT id,substring(description from '{zh=([^}]+)/}') as description,type FROM t order by id limit 15 offset 0

（编辑：李大同）

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