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2010-05-26T10:22:21Z

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== Finding the Start Position of a String Within Another String Using Wildcards==



<source lang="sql">
4>
5> CREATE TABLE employee(
6> id INTEGER NOT NULL PRIMARY KEY,
7> first_name VARCHAR(10),
8> last_name VARCHAR(10),
9> salary DECIMAL(10,2),
10> start_Date DATETIME,
11> region VARCHAR(10),
12> city VARCHAR(20),
13> managerid INTEGER
14> );
15> GO
1> INSERT INTO employee VALUES (1, "Jason" , "Martin", 5890,"2005-03-22","North","Vancouver",3);
2> GO
(1 rows affected)
1> INSERT INTO employee VALUES (2, "Alison", "Mathews",4789,"2003-07-21","South","Utown",4);
2> GO
(1 rows affected)
1> INSERT INTO employee VALUES (3, "James" , "Smith", 6678,"2001-12-01","North","Paris",5);
2> GO
(1 rows affected)
1> INSERT INTO employee VALUES (4, "Celia" , "Rice", 5567,"2006-03-03","South","London",6);
2> GO
(1 rows affected)
1> INSERT INTO employee VALUES (5, "Robert", "Black", 4467,"2004-07-02","East","Newton",7);
2> GO
(1 rows affected)
1> INSERT INTO employee VALUES (6, "Linda" , "Green" , 6456,"2002-05-19","East","Calgary",8);
2> GO
(1 rows affected)
1> INSERT INTO employee VALUES (7, "David" , "Larry", 5345,"2008-03-18","West","New York",9);
2> GO
(1 rows affected)
1> INSERT INTO employee VALUES (8, "James" , "Cat", 4234,"2007-07-17","West","Regina",9);
2> GO
(1 rows affected)
1> INSERT INTO employee VALUES (9, "Joan" , "Act", 6123,"2001-04-16","North","Toronto",10);
2> GO
(1 rows affected)
1>
2> select * from employee;
3> GO
id first_name last_name salary start_Date region city managerid
----------- ---------- ---------- ------------ ----------------------- ---------- -------------------- -----------
1 Jason Martin 5890.00 2005-03-22 00:00:00.000 North Vancouver 3
2 Alison Mathews 4789.00 2003-07-21 00:00:00.000 South Utown 4
3 James Smith 6678.00 2001-12-01 00:00:00.000 North Paris 5
4 Celia Rice 5567.00 2006-03-03 00:00:00.000 South London 6
5 Robert Black 4467.00 2004-07-02 00:00:00.000 East Newton 7
6 Linda Green 6456.00 2002-05-19 00:00:00.000 East Calgary 8
7 David Larry 5345.00 2008-03-18 00:00:00.000 West New York 9
8 James Cat 4234.00 2007-07-17 00:00:00.000 West Regina 9
9 Joan Act 6123.00 2001-04-16 00:00:00.000 North Toronto 10
(9 rows affected)
1>
2>
3> SELECT ID, first_name
4> FROM employee
5> WHERE PATINDEX("%J%", first_name) > 0
6> GO
ID first_name
----------- ----------
1 Jason
3 James
8 James
9 Joan
(4 rows affected)
1>
2>
3>
4>
5> drop table employee;
6> GO</source>

== PATINDEX searches for a pattern of characters within a string.==



<source lang="sql">
PATINDEX is not case sensitive.
PATINDEX returns 0 if no match is found.
PATINDEX allows the handling of wildcards, unlike CHARINDEX.
12> SELECT PATINDEX("%sqle%","This is www.sqle.ru")
13>
14> GO
-----------
13
(1 rows affected)</source>

== SELECT PATINDEX("%M_rs%", "The stars near Mars are far from ours")==



<source lang="sql">
4> SELECT PATINDEX("%M_rs%", "The stars near Mars are far from ours")
5> GO
-----------
16
(1 rows affected)
1></source>

== select PATINDEX("%v_r%", "SQL Server")==



<source lang="sql">
2>
3> select PATINDEX("%v_r%", "SQL Server")
4> GO
-----------
8
(1 rows affected)</source>

== WHERE PATINDEX("%computer[^s]%", notes) > 0==



<source lang="sql">
4> CREATE TABLE titles(
5> title_id varchar(20),
6> title varchar(80) NOT NULL,
7> type char(12) NOT NULL,
8> pub_id char(4) NULL,
9> price money NULL,
10> advance money NULL,
11> royalty int NULL,
12> ytd_sales int NULL,
13> notes varchar(200) NULL,
14> pubdate datetime NOT NULL
15> )
16> 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> UPDATE titles
2> SET notes=STUFF(notes, PATINDEX("%computer[^s]%", notes),
3> DATALENGTH("computer"), "Hi-Tech Computers")
4> WHERE PATINDEX("%computer[^s]%", notes) > 0
5> GO
(0 rows affected)
1>
2>
3> drop table titles;
4> GO</source>

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в 13:46, 26 мая 2010

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