将字符串附加到查询结果

Question

我有一个场景，我想在数据库中提取的所有值的开头附加一个字符串'rajat'。查询看起来像

('rajat' + (SELECT a FROM b 
        WHERE b >= (SELECT TOP 1 c FROM d ORDER BY e DESC))) 

但这似乎不起作用。

Answer 1

SELECT a = 'rajat' + tableB.a
FROM dbo.b tableB
WHERE tableB.b >= (SELECT TOP 1 c FROM d ORDER BY e DESC)

Answer 2

假设列a

的数据类型不同

SELECT 'rajat ' + cast(a as varchar(50)) as a
WHERE b >= (SELECT TOP 1 c FROM d ORDER BY e DESC)

如果列a是varchar，则简单直接。

SELECT 'rajat ' + a as a
WHERE b >= (SELECT TOP 1 c FROM d ORDER BY e DESC)