SQL Server/T-SQL/String Functions/REPLICATE — различия между версиями

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Текущая версия на 10:19, 26 мая 2010

REPLICATE("*", 20 - LEN(Name))

1> create table employee(
2>     ID          int,
3>     name        nvarchar (10),
4>     salary      int,
5>     start_date  datetime,
6>     city        nvarchar (10),
7>     region      char (1))
8> GO
1>
2> insert into employee (ID, name,    salary, start_date, city,       region)
3>               values (1,  "Jason", 40420,  "02/01/94", "New York", "W")
4> GO
(1 rows affected)
1> insert into employee (ID, name,    salary, start_date, city,       region)
2>               values (2,  "Robert",14420,  "01/02/95", "Vancouver","N")
3> GO
(1 rows affected)
1> insert into employee (ID, name,    salary, start_date, city,       region)
2>               values (3,  "Celia", 24020,  "12/03/96", "Toronto",  "W")
3> GO
(1 rows affected)
1> insert into employee (ID, name,    salary, start_date, city,       region)
2>               values (4,  "Linda", 40620,  "11/04/97", "New York", "N")
3> GO
(1 rows affected)
1> insert into employee (ID, name,    salary, start_date, city,       region)
2>               values (5,  "David", 80026,  "10/05/98", "Vancouver","W")
3> GO
(1 rows affected)
1> insert into employee (ID, name,    salary, start_date, city,       region)
2>               values (6,  "James", 70060,  "09/06/99", "Toronto",  "N")
3> GO
(1 rows affected)
1> insert into employee (ID, name,    salary, start_date, city,       region)
2>               values (7,  "Alison",90620,  "08/07/00", "New York", "W")
3> GO
(1 rows affected)
1> insert into employee (ID, name,    salary, start_date, city,       region)
2>               values (8,  "Chris", 26020,  "07/08/01", "Vancouver","N")
3> GO
(1 rows affected)
1> insert into employee (ID, name,    salary, start_date, city,       region)
2>               values (9,  "Mary",  60020,  "06/09/02", "Toronto",  "W")
3> GO
(1 rows affected)
1>
2> select * from employee
3> GO
ID          name       salary      start_date              city       region
----------- ---------- ----------- ----------------------- ---------- ------
          1 Jason            40420 1994-02-01 00:00:00.000 New York   W
          2 Robert           14420 1995-01-02 00:00:00.000 Vancouver  N
          3 Celia            24020 1996-12-03 00:00:00.000 Toronto    W
          4 Linda            40620 1997-11-04 00:00:00.000 New York   N
          5 David            80026 1998-10-05 00:00:00.000 Vancouver  W
          6 James            70060 1999-09-06 00:00:00.000 Toronto    N
          7 Alison           90620 2000-08-07 00:00:00.000 New York   W
          8 Chris            26020 2001-07-08 00:00:00.000 Vancouver  N
          9 Mary             60020 2002-06-09 00:00:00.000 Toronto    W
(9 rows affected)
1>
1>
2> -- REPLICATE() and SPACE() Functions
3>
4> SELECT Name + REPLICATE("*", 20 - LEN(Name)) FROM Employee
5> GO
Jason***************
Robert**************
Celia***************
Linda***************
David***************
James***************
Alison**************
Chris***************
Mary****************
(9 rows affected)
1>
2> drop table employee
3> GO
1>



REPLICATE: replicate the same string several times

1> -- REPLICATE: replicate the same string several times.
2>
3> SELECT REPLICATE("www.sqle.ru",5)
4> GO
----------------------------------------------------------------------
www.sqle.ruwww.sqle.ruwww.sqle.ruwww.sqle.ruwww.sqle.ru
(1 rows affected)
1>



REPLICATE string

25>
26> IF EXISTS(SELECT name FROM sys.tables
27>     WHERE name = "T")
28>     DROP TABLE T
29> GO
1>
2> CREATE TABLE T (
3>     c1 int,
4>     c2 varchar(8000)
5> )
6> GO
1>
2> DECLARE @v1 varchar(max)
3>
4> SET @v1 = REPLICATE("A",7999) + "B"
5> INSERT T VALUES (1, @v1)
6> SELECT RIGHT(c2,2) "Right 2 of c2" FROM T
7>
8> SET @v1 = @v1 + "B"
9> INSERT T VALUES (2, @v1)
10> SELECT RIGHT(c2,2) "Right 2 of c2" FROM T
11> GO
(1 rows affected)
Right 2 of c2
-------------
AB
Msg 8152, Level 16, State 10, Server sqle\SQLEXPRESS, Line 9
String or binary data would be truncated.
The statement has been terminated.
(1 rows affected)
Right 2 of c2
-------------
AB
(1 rows affected)
1>
2> drop table t
3> GO



Use set to assign value to a variable with replicate function

 
2>
3>
4> IF EXISTS(SELECT name FROM sys.tables
5>     WHERE name = "T")
6>     DROP TABLE T
7> GO
1>
2> CREATE TABLE T (
3>     c1 int,
4>     c2 varchar(8000)
5> )
6> GO
1>
2> DECLARE @v1 varchar(max)
3>
4> SET @v1 = REPLICATE("A",7999) + "B"
5> INSERT T VALUES (1, @v1)
6> SELECT RIGHT(c2,2) "Right 2 of c2" FROM T
7>
8> SET @v1 = @v1 + "B"
9> INSERT T VALUES (2, @v1)
10> SELECT RIGHT(c2,2) "Right 2 of c2" FROM T
11>
12> GO
(1 rows affected)
Right 2 of c2
-------------
AB
Msg 8152, Level 16, State 10, Server J\SQLEXPRESS, Line 9
String or binary data would be truncated.
The statement has been terminated.
(1 rows affected)
Right 2 of c2
-------------
AB
(1 rows affected)
1>
2> select * from t;
3> GO
c1          c2




















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          1 AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
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AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAB
(1 rows affected)
1>
2> drop table t;
3> GO
Источник — «http://sqle.ru/index.php?title=SQL_Server/T-SQL/String_Functions/REPLICATE&oldid=5545»