mysql查询某张表是否存在某个字段

Mysql

1、判断一个表是否存在

语法:

SELECT table_name FROM information_schema.TABLES WHERE table_name ='表名';

sql例子:

SELECT table_name FROM information_schema.TABLES WHERE table_name ='t_iov_vehicle_owner_info'

存在:


不存在:

备注,sql也可以这样写:

select count(*) from information_schema.tables where table_name='t_iov_vehicle_owner_info'


2、判断表中一个字段是否存在

语法:

select count(*) from information_schema.columns where table_name = '表名' and column_name = '字段名'

sql例子:

select count(*) from information_schema.columns where table_name = 't_iov_vehicle_owner_info' and column_name = 'id'

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