Conditional Logic IF
18> CREATE TABLE employee (emp_no INTEGER NOT NULL,
19> emp_fname CHAR(20) NOT NULL,
20> emp_lname CHAR(20) NOT NULL,
21> dept_no CHAR(4) NULL)
22>
23> insert into employee values(1, 'Matthew', 'Smith', 'd3')
24> insert into employee values(2, 'Ann', 'Jones', 'd3')
25> insert into employee values(3, 'John', 'Barrimore','d1')
26> insert into employee values(4, 'James', 'James', 'd2')
27> insert into employee values(5, 'Elsa', 'Bertoni', 'd2')
28> insert into employee values(6, 'Elke', 'Hansel', 'd2')
29> insert into employee values(7, 'Sybill', 'Moser', 'd1')
30>
31> select * from employee
32> GO
(1 rows affected)
(1 rows affected)
(1 rows affected)
(1 rows affected)
(1 rows affected)
(1 rows affected)
(1 rows affected)
emp_no emp_fname emp_lname dept_no
----------- -------------------- -------------------- -------
1 Matthew Smith d3
2 Ann Jones d3
3 John Barrimore d1
4 James James d2
5 Elsa Bertoni d2
6 Elke Hansel d2
7 Sybill Moser d1
(7 rows affected)
1>
2> -- Conditional Logic IF
3>
4> CREATE PROCEDURE spTableExists
5> @TableName VarChar(128)
6> AS
7> IF EXISTS(SELECT * FROM sysobjects WHERE name = @TableName)
8> PRINT @TableName + 'exists'
9> GO
1>
2> EXEC spTableExists 'employee'
3> GO
employeeexists
1>
2> drop procedure spTableExists
3> drop table employee
4> GO
1>
2>
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