mysql - 从多个表中插入相同的字段（以更有效的方式）

Question

我希望避免重写下面的相同查询（对于每个唯一表）：

Insert Into dbo.DatabaseNEW (Field1 , Field 2)
Select Field 1, Field 2  FROM OldDatabase.dbo.[Table 1] WHERE DESCRIPTION LIKE 'Something';

Insert Into dbo.DatabaseNEW (Field1 , Field 2)
Select Field 1, Field 2  FROM OldDatabase.dbo.[Table 2] WHERE DESCRIPTION LIKE 'Something';

我试过组合如下查询，但它不起作用：

Insert Into dbo.DatabaseNEW (Field1 , Field 2)
Select Field 1, Field 2  FROM OldDatabase.dbo.[Table 1], OldDatabase.dbo.[Table 2] WHERE DESCRIPTION LIKE 'Something';

有什么帮助吗？对不起菜鸟问题。谢谢！

Answer 1

您可以使用 UNION ALL 运算符

Insert Into dbo.DatabaseNEW (Field1 , Field2)
(
Select Field1, Field2  FROM OldDatabase.dbo.[Table 1] WHERE DESCRIPTION LIKE 'Something'
UNION ALL
Select Field1, Field2  FROM OldDatabase.dbo.[Table 2] WHERE DESCRIPTION LIKE 'Something'
);