Question

很抱歉这是一个语法问题，但是在T-SQL中如何在INSERT语句中指定我要插入哪个DB以及从哪个DB加入LEFT JOIN？

if not exists (select * from [DB_A].[dbo.a_test])
create table [DB_A].[dbo.a_test] (
a int(10) ,
b int(10) ,
c varchar(200) ,
d varchar(200) ,
e varchar(200) ,            
PRIMARY KEY (a)
)


INSERT INTO [DB_A].[dbo.a_test] (a,b,c, d)
VALUES dbo.products.product_info, dbo.products.product_date, dbo.products.smth, *dbo.program.program_name*, dbo.program.program_smth
FROM [DB_B].dbo.products    
LEFT JOIN [DB_B].dbo.program
ON dbo.program.program_name = dbo.products.product_info

很抱歉这样一个noob问题，但我找不到合适的例子。

Answer 1

您想要insert into . . . select：

INSERT INTO [DB_A].[dbo.a_test](a,b,c,d,e) --ADDED A COLUMN
    select p.product_info, p.product_date, p.smth, pr.program_name, pr.program_smth
    FROM [DB_B].dbo.products p LEFT JOIN
         [DB_B].dbo.program pr
         ON p.program_name = pr.product_info;

我还修复了查询以使用表别名，因此更容易阅读。

Answer 2

INSERT INTO [DB_A].[dbo.a_test] (a,b,c, d)
SELECT dbo.products.product_info, dbo.products.product_date, dbo.products.smth, dbo.program.program_smth
FROM [DB_B].dbo.products    
LEFT JOIN [DB_B].dbo.program
ON dbo.program.program_name = dbo.products.product_info

使用LEFT JOIN进行T-SQL INSERT INTO

2 个答案: