云数据库 GAUSSDB-字符处理函数和操作符:trim([leading |trailing |both] [characters] from string)
时间:2025-08-28 15:00:54
trim([leading |trailing |both] [characters] from string)
描述:从字符串string的开头、结尾或两边删除只包含characters中字符(缺省是一个空白)的最长的字符串。
返回值类型:text。
示例:
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gaussdb=# SELECT trim(BOTH 'x' FROM 'xTomxx'); btrim ------- Tom (1 row) |
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gaussdb=# SELECT trim(LEADING 'x' FROM 'xTomxx'); ltrim ------- Tomxx (1 row) |
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gaussdb=# SELECT trim(TRAILING 'x' FROM 'xTomxx'); rtrim ------- xTom (1 row) |
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