我怎样才能得到 mySql 列的长度/值 [英] How can i get mySql column Length/Values

问题描述

我可以使用此命令获取列表信息，但不会返回列Length/Values，我该如何获取?

I can get column table information with this command, but that don't return column Length/Values, how can i get that?

SELECT COLUMN_NAME, DATA_TYPE FROM INFORMATION_SCHEMA.COLUMNS WHERE table_name = 'tableName' 

推荐答案

SQL 有一个 LEN() 函数.这会给你一个字段的长度.但是更新将是解决方案:

SQL has a LEN() Function. Which will give you a length of a field. However updated would be the solution:

SELECT CHARACTER_MAXIMUM_LENGTH FROM information_schema.COLUMNS WHERE TABLE_SCHEMA = 'Database' AND TABLE_NAME = 'Table' AND COLUMN_NAME = 'Field'

希望有帮助

这篇关于我怎样才能得到 mySql 列的长度/值的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！