sql - 如何在单个 SELECT 查询中设置多个 T-SQL 变量？

Question

我有 3 个变量:@testid , @sampleid和 @clientid .

如何设置 @sampleid和 @clientid通过执行一次这个查询？

SELECT
  [sample].sampleid,
  [client].clientid
FROM
  dbo.[test]
  LEFT OUTER JOIN dbo.[sampleslice] ON dbo.[test].samplesliceid = dbo.[sampleslice].samplesliceid
  LEFT OUTER JOIN dbo.[sample] ON dbo.[sampleslice].sampleid = dbo.[sample].sampleid
  LEFT OUTER JOIN dbo.[client] ON dbo.[sample].clientid = dbo.[client].clientid
WHERE
  testid = @testid

Answer 1

DECLARE @sampleid YOUR_VAR_TYPE;
DECLARE @clientid YOUR_VAR_TYPE;

SELECT
   @sampleid = [sample].sampleid, 
   @clientid = [client].clientid
FROM dbo.[test]


-- The variables are now initialized. You can now use them below.above