Mega Code Archive
SELECT query with a variable for the table name so that condition determines which table the result set is based on
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4>
5> CREATE TABLE sales(
6> stor_id char(4) NOT NULL,
7> ord_num varchar(20) NOT NULL,
8> ord_date datetime NOT NULL,
9> qty smallint NOT NULL,
10> payterms varchar(12) NOT NULL,
11> title_id varchar(80)
12> )
13> GO
1> insert sales values('1', 'QA7442.3', '09/13/94', 75, 'ON Billing','1')
2> insert sales values('2', 'D4482', '09/14/94', 10, 'Net 60', '1')
3> insert sales values('3', 'N914008', '09/14/94', 20, 'Net 30', '2')
4> insert sales values('4', 'N914014', '09/14/94', 25, 'Net 30', '3')
5> insert sales values('5', '423LL922', '09/14/94', 15, 'ON Billing','3')
6> insert sales values('6', '423LL930', '09/14/94', 10, 'ON Billing','2')
7> GO
(1 rows affected)
(1 rows affected)
(1 rows affected)
(1 rows affected)
(1 rows affected)
(1 rows affected)
1>
2> DECLARE @chvTable VARCHAR(30),
3> @chvSQL VARCHAR(255)
4> IF getdate() > '7/1/1997'
5> SELECT @chvTable = 'sales'
6> ELSE
7> SELECT @chvTable = 'authors'
8> SELECT @chvSQL = 'SELECT * FROM ' + @chvTable
9> EXEC (@chvSQL)
10> GO
stor_id ord_num ord_date qty payterms title_id
------- -------------------- ----------------------- ------ ------------ --------------------------------------------------------------------------------
1 QA7442.3 1994-09-13 00:00:00.000 75 ON Billing 1
2 D4482 1994-09-14 00:00:00.000 10 Net 60 1
3 N914008 1994-09-14 00:00:00.000 20 Net 30 2
4 N914014 1994-09-14 00:00:00.000 25 Net 30 3
5 423LL922 1994-09-14 00:00:00.000 15 ON Billing 3
6 423LL930 1994-09-14 00:00:00.000 10 ON Billing 2
(6 rows affected)
1>
2> drop table sales;
3> GO
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