Mega Code Archive
Use of Functions in Sql statement Concatenation and EXEC
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6> CREATE TABLE Customers (
7> CustomerID nchar (5) NOT NULL ,
8> CompanyName nvarchar (40) NOT NULL ,
9> ContactName nvarchar (30) NULL ,
10> ContactTitle nvarchar (30) NULL ,
11> Address nvarchar (60) NULL ,
12> City nvarchar (15) NULL ,
13> Region nvarchar (15) NULL ,
14> PostalCode nvarchar (10) NULL ,
15> Country nvarchar (15) NULL ,
16> Phone nvarchar (24) NULL ,
17> Fax nvarchar (24) NULL
18> )
19> GO
1>
2> INSERT Customers VALUES('1','A','Maria', 'Sales', 'Str. 57', 'Berlin' ,NULL,'12209', 'Germany','111-1111111','111-1111111')
3> INSERT Customers VALUES('2','M','Joe', 'Owner', 'Ave. 231','Vancouver' ,NULL,'05023', 'Mexico', '(222) 222-3332',NULL)
4> INSERT Customers VALUES('3','H','Thomas', 'Sales', 'Sq. 111','London' ,NULL,'1D00P', 'UK', '(444) 444-4444','(444) 444-4444')
5> INSERT Customers VALUES('4','B','Berg', 'Order', 'Blv 8','Toronto' ,NULL,'00222', 'Sweden', '4444-55 55 65','5555-55 55 55')
6> INSERT Customers VALUES('5','S','Moos', 'Sales', 'Fort 57','New York' ,NULL,'68306', 'Germany','6666-66666','6666-77777')
7> INSERT Customers VALUES('6','F','Cite', 'Manager','24 ','Dalles' ,NULL,'67000', 'France', '88.60.15.31','88.60.15.32')
8> INSERT Customers VALUES('7','C','Sommer', 'Owner', 'Araq, 67','Paris' ,NULL,'28023', 'Spain', '(91) 555 22 82','(91) 555 91 99')
9> INSERT Customers VALUES('8','P','Leb', 'Owner', '12 ','Beijing' ,NULL,'13008', 'France', '91.24.45.40','91.24.45.41')
10> INSERT Customers VALUES('9','D','Elizabeth','Manager','23 Blvd.','Tsawassen','BC', 'T2F8M4','Canada', '(604) 555-4729','(604) 555-3745')
11> go
(1 rows affected)
(1 rows affected)
(1 rows affected)
(1 rows affected)
(1 rows affected)
(1 rows affected)
(1 rows affected)
(1 rows affected)
(1 rows affected)
1> -- But this does
2> DECLARE @NumberOfLetters AS int
3> SET @NumberOfLetters = 15
4> DECLARE @str AS varchar(255)
5> SET @str = 'SELECT LEFT(CompanyName,' + CAST(@NumberOfLetters AS varchar) + ') AS
6~ ShortName FROM Customers'
7> EXEC(@str)
8> GO
ShortName
---------------
A
M
H
B
S
F
C
P
D
(9 rows affected)
1>
2> drop table Customers;
3> GO
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