Mega Code Archive
Updating Data Using the CASE Expression
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6>
7> CREATE TABLE sales(
8> stor_id char(4) NOT NULL,
9> ord_num varchar(20) NOT NULL,
10> ord_date datetime NOT NULL,
11> qty smallint NOT NULL,
12> payterms varchar(12) NOT NULL,
13> title_id varchar(80)
14> )
15> 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>
3> UPDATE sales
4> SET payterms =
5> CASE
6> WHEN (SELECT SUM(qty) FROM sales s1
7> WHERE sales.stor_id = s1.stor_id) < 10
8> THEN 'On Billing'
9> WHEN (SELECT SUM(qty) FROM sales s1
10> WHERE sales.stor_id = s1.stor_id) < 100
11> THEN 'Net 30'
12> ELSE 'Net 60'
13> END
14> GO
(6 rows affected)
1>
2> SELECT stor_id, SUBSTRING(ord_num,1,5) ord_num,
3> ord_date, qty, payterms, title_id FROM sales
4> GO
stor_id ord_num ord_date qty payterms title_id
------- ------- ----------------------- ------ ------------ --------------------------------------------------------------------------------
1 QA744 1994-09-13 00:00:00.000 75 Net 30 1
2 D4482 1994-09-14 00:00:00.000 10 Net 30 1
3 N9140 1994-09-14 00:00:00.000 20 Net 30 2
4 N9140 1994-09-14 00:00:00.000 25 Net 30 3
5 423LL 1994-09-14 00:00:00.000 15 Net 30 3
6 423LL 1994-09-14 00:00:00.000 10 Net 30 2
(6 rows affected)
1>
2> drop table sales;
3> GO
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