标签：code ber number substring 转换 postgres text lin comment
--把‘1234‘转成整数select cast(‘1234‘ as integer ) ;--用substring截取字符串，从第8个字符开始截取2个字符：结果是12select cast(substring(‘1234abc12‘,8,2) as integer)---使用to_number函数来转换成整数---to_number(text, text) 返回的类型 numeric 把字串转换成numeric to_number(‘12,454.8-‘, ‘99G999D9S‘)select to_number(‘12121‘,‘999999999‘)标签：code ber number substring 转换 postgres text lin comment
原文地址：https://www.cnblogs.com/telwanggs/p/11056467.html
