My friend gave me stored procedure, and I understand this code:
create table t (x varchar(50), y int)
insert into t (x)
select 'bob' + char(1) + 'fred'
select * from t
Please explain me and corect this code.
AndrzejOn Wed, 14 Nov 2007 11:05:00 -0800, J?dru? <anowacki.pila@.interia.pl>
wrote:
Quote:
Originally Posted by
>Hello
>
>My friend gave me stored procedure, and I understand this code:
>
>create table t (x varchar(50), y int)
Create an empty table. The table has two columns, one varying length
and one integer.
Quote:
Originally Posted by
>insert into t (x)
We are going to INSERT new rows(s) into the table, but only assign
data to the column named x.
Quote:
Originally Posted by
>select 'bob' + char(1) + 'fred'
The source of data for the INSERT is the result set of a SELECT. The
SELECT does not read any table, it just returns one row. The one
column in the result set is a character string made up by
concatenating (using the + operator) three other strings. The string
in the middle is created using the CHAR function. The CHAR function
converts a number ranging from 0 to 255 into an ASCII character. The
ASCII character that corresponds to 1 is not a printable character;
for me the results look like an empty square.
Quote:
Originally Posted by
>select * from t
This returns the one row of the table.
x y
---------------- ----
bob
fred NULL
Quote:
Originally Posted by
>Please explain me and corect this code.
The code is correct, though it looks like a simple example of
something rather than anything of actual use.
Roy Harvey
Beacon Falls, CT|||On 14 Lis, 21:03, "Roy Harvey (SQL Server MVP)" <roy_har...@.snet.net>
wrote:
Quote:
Originally Posted by
On Wed, 14 Nov 2007 11:05:00 -0800, J?dru? <anowacki.p...@.interia.pl>
wrote:
>
Quote:
Originally Posted by
Hello
>
Quote:
Originally Posted by
My friend gave me stored procedure, and I understand this code:
>
Quote:
Originally Posted by
create table t (x varchar(50), y int)
>
Create an empty table. The table has two columns, one varying length
and one integer.
>
Quote:
Originally Posted by
insert into t (x)
>
We are going to INSERT new rows(s) into the table, but only assign
data to the column named x.
>
Quote:
Originally Posted by
select 'bob' + char(1) + 'fred'
>
The source of data for the INSERT is the result set of a SELECT. The
SELECT does not read any table, it just returns one row. The one
column in the result set is a character string made up by
concatenating (using the + operator) three other strings. The string
in the middle is created using the CHAR function. The CHAR function
converts a number ranging from 0 to 255 into an ASCII character. The
ASCII character that corresponds to 1 is not a printable character;
for me the results look like an empty square.
>
Quote:
Originally Posted by
select * from t
>
This returns the one row of the table.
x y
---------------- ----
bob
fred NULL
>
Quote:
Originally Posted by
Please explain me and corect this code.
>
The code is correct, though it looks like a simple example of
something rather than anything of actual use.
>
Roy Harvey
Beacon Falls, CT
Thank You very much.
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