判断表中一个字段是否存在的方法:
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'
推荐:MySQL教程
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