向直通查询添加参数

Question

我正在尝试在传递查询中使用参数问题是当我设置语句时我得到

Incorrect syntax near '+'. Expecting ')'

我以前做过，所以我不确定我现在做错了什么。我缩短了下面的查询以给出要点。

DECLARE @WORK_DATE AS VARCHAR(20)

SET @WORK_DATE = '20160210'

SELECT * FROM OPENQUERY(DATA_BASE_1,
  'SELECT EMPLOYEE.EMPLOYEE_NUMBER AS EMPLOYEE_ID
  FROM TABLE_1 EMPLOYEE
  LEFT JOIN TABLE_2 PERSON
  ON EMPLOYEE.EMPLOYEE_NUMBER = PERSON.EMPLOYEE_NUMBER
  AND PERSON.WORK_DATE = '''''+ @WORK_DATE + '''''')

Answer 1

来自Transact-SQL OPENQUERY documentation：

Remarks

OPENQUERY does not accept variables for its arguments.

一种方法是将变量传递给存储要执行的查询的字符串，然后执行它。

DECLARE @SQL_TO_EXEC NVARCHAR(MAX), @WORK_DATE VARCHAR(20)

SET @WORK_DATE = '20160210'
SET @SQL_TO_EXEC = 'SELECT * FROM OPENQUERY(DATA_BASE_1, ''SELECT EMPLOYEE.EMPLOYEE_NUMBER AS EMPLOYEE_ID FROM TABLE_1 EMPLOYEE LEFT JOIN TABLE_2 PERSON ON EMPLOYEE.EMPLOYEE_NUMBER = PERSON.EMPLOYEE_NUMBER AND PERSON.WORK_DATE = '''''+ @WORK_DATE + ''''''')'

EXEC (@SQL_TO_EXEC)

向直通查询添加参数

Adding a parameter to a pass through query

sql-server

openquery