SQL Server/T-SQL Tutorial/System Functions/context info

Session Variables

   <source lang="sql">

5> CREATE TABLE titles( 6> title_id varchar(20), 7> title varchar(80) NOT NULL, 8> type char(12) NOT NULL, 9> pub_id char(4) NULL, 10> price money NULL, 11> advance money NULL, 12> royalty int NULL, 13> ytd_sales int NULL, 14> notes varchar(200) NULL, 15> pubdate datetime NOT NULL 16> ) 17> GO 1> 2> insert titles values ("1", "Secrets", "popular_comp", "1389", $20.00, $8000.00, 10, 4095,"Note 1","06/12/94") 3> insert titles values ("2", "The", "business", "1389", $19.99, $5000.00, 10, 4095,"Note 2","06/12/91") 4> insert titles values ("3", "Emotional", "psychology", "0736", $7.99, $4000.00, 10, 3336,"Note 3","06/12/91") 5> insert titles values ("4", "Prolonged", "psychology", "0736", $19.99, $2000.00, 10, 4072,"Note 4","06/12/91") 6> insert titles values ("5", "With", "business", "1389", $11.95, $5000.00, 10, 3876,"Note 5","06/09/91") 7> insert titles values ("6", "Valley", "mod_cook", "0877", $19.99, $0.00, 12, 2032,"Note 6","06/09/91") 8> insert titles values ("7", "Any?", "trad_cook", "0877", $14.99, $8000.00, 10, 4095,"Note 7","06/12/91") 9> insert titles values ("8", "Fifty", "trad_cook", "0877", $11.95, $4000.00, 14, 1509,"Note 8","06/12/91") 10> 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> 2> 3> DECLARE @cost money 4> SELECT @cost = price FROM titles 5> WHERE title_id = "bu1032" 6> SET context_info @cost 7> GO Msg 2743, Level 16, State 3, Server J\SQLEXPRESS, Line 6 SET CONTEXT_INFO statement requires varbinary (128) NOT NULL parameter. 1> 2> 3> drop table titles; 4> GO</source>