在几个表中搜索列名，而不是整个数据库SQL

Question

SELECT something 
FROM table1, table2, table 
WHERE tableColumn = "tableName"

Answer 1

如果有必要，你可以做一些关于模式表的疯狂复杂的事情，但这应该适用于：

select <something> 
    from table1
    where 
        tableColumn = "tableName"
union all
select <something>
    from table2
    where 
        tableColumn = "tableName"
union all
select <something>
    from table3
    where
        tableColumn = "tableName"

只需确保从联合中的每个查询中选择相同类型的列。