the database Server has multiple CPUs, the SQL Server query engine uses the parallel method, that is, multiple CPUs are used in the entire computing process, and each CPU "shares" a part of the computing tasks, finally, it is a kind of behavior to merge computing of various CPUs. Sometimes, improper parallel queries will not accelerate the query speed, but will
First, pre-installation preparation1. Download the SQL Server version, select the appropriate version under the Portal's left menu server module, because the operating system version of the server is Windows Server R2, I select the SQL
Let's talk about the Views in SQL Server and SQL Server.
1. What is a view?
2. Why view;
3. order by in the view;
4. Refresh the view;
5. Update the view;
6. view options;
7. Index View;
1. What is a view?
A view is a virtual table defined by a query. Unlike a physical table, the data in the view has no physical repres
; SqlDataAdapter ( 2 " select au_lname, au_fname from Authors WHERE au_id = @au_id " , conn); 3 SqlParameter parm = MYCOMMAND.SELECTCOMMAND.PARAMETERS.ADD ( " @au_id " , 4 SqlDbType.VarChar, 11 Span style= "color: #000000;"
>); 5 parm.value = login.text; Note: And the second similarity, this method is to supplement the existence of Method 2, because often in many cases the business is simple do not need to use proc, you can use this method4. Filter inputFiltering input can remove
index is called an external fragment, at level 11th-Fragments in the discussion.As mentioned earlier, an exponent can have multiple intermediate levels.It's like our white page users are looking for Helen Mayer, open the phone book, find the first page, only the first page is pink. In the list of sort entries for the Pink page, there is a "for" the name Between Fernandez, Zelda, and "Olson, Carl," see the Blue Page5:431. When our users go to the Blue
SQL Server 2000 SQL Server evaluation period has expired Solution
Two days ago, the server had to be restarted for some reason. After restarting, it was found that SQL Server2000 could not be started. Click "start" in the Service
statement that was submitted in SQLCLR.
Dynamic SQL comes in two ways: non-parametric and parameterized. In non-parameterized SQL, the developer stitching the parameters into the SQL string. Like what:Select @sql = ' Select MyCol from tbl where keycol = ' + convert (v
Myth #26: There is a real "transaction nesting" in SQL Server
Error
Nested transactions do not appear to allow transaction nesting as their syntax behaves. I don't know why anyone would write code like that, and the only thing I could think of was a guy who scoffed at the SQL Ser
Misunderstanding #13. The DMV cannot be used in SQL Server 2000 compatibility mode
Error
There has been a lot of misunderstanding about compatibility mode. Does the 80 compatibility mode database imply the ability to attach or recover to a SQL Server 2000 database? Of course not. This simply means some T-
match, a worthy range of matching or more than two conditions and connection. The form is as follows:Column name operators OrColumn names can appear on one side of the operator, while constants or variables appear on the other side of the operator. Such as:Name= ' Zhang San 'Price >50005000Name= ' Zhang San ' and price >5000If an expression does not meet the form of sarg, it cannot limit the scope of the search, which means that SQL
SQL Server focuses on filtering indexes and SQL Server Indexes
Preface
In this section, we will continue to talk about index knowledge. We have clustered indexes, non-clustered indexes, and covered indexes. Here we also have a filter index, which can improve query performance through index filtering, brief content and
tableCopy codeThe Code is as follows: select distinct * into tmp1 from Users2. Delete the Users tableCopy codeThe Code is as follows: drop table Users3. import data from Table tmp1 to the Users table.Copy codeThe Code is as follows: select * into Users from tmp14. Delete the tmp1 tableCopy codeThe Code is as follows: drop table tmp1
How to delete duplicate records in SQL Server 2000
1. If a primary key exi
); insert into tb_menu (id, title, parent) values (48, 'third-level menu 48', 30 ); insert into tb_menu (id, title, parent) values (49, 'level 3 menu 49', 31); insert into tb_menu (id, title, parent) values (50, 'Level 3 menu 50', 31); commit;
2. Search for all upper-level nodes
-- Query all the upper-level root nodes of a node (44) in the tree structure with cte_parent (id, title, parent) as (-- start condition select id, title, parent from tb_menu where id = 44 -- list subnode query conditions
parameter.View constraint information for a data object under a databaseSp_helpconstraint @objname9. View all stored procedures and functions in the databaseUse @database_nameSp_stored_proceduresView the source code of stored procedures and functionsSp_helptext ' @procedure_name 'View data object names that contain a string @strSELECT DISTINCT object_name (ID) from syscomments where text like '% @str% 'Create an encrypted stored procedure or function
SQL Server queries table indexes and SQL Server Indexes
SELECT index name = a. name
, Table name = c. name
, Index field name = d. name
, Index field location = d. colid
FROM sysindexes a JOIN sysindexkeys B ON. id = B. id AND. indid = B. indid JOIN sysobjects c ON B. id = c. id JOIN syscolumns d ON B. id = d. id AND B
SQL server keyword description (text), SQL server
The following describes the cross apply and outer apply keywords in sqlserver as follows:
1. cross apply and OUTER APPLY
The MSDN explanation is as follows (my personal understanding is not clear ):
You can use the APPLY operator to call the table value function for eac
.
After introducing the SARG, let's summarize the experience of using SARG and the different conclusions encountered in practice and some of the data:
1. Whether the like statement belongs to Sarg depends on the type of wildcard character used
such as: Name like ' Zhang% ', this belongs to Sarg
And: Name like '% Zha
string @strSELECT DISTINCT object_name (ID) from syscomments where text like '% @str% 'Create an encrypted stored procedure or function with the with encryption parameter in front of ASDecryption of encrypted stored procedures and functions can be done using the Sp_decrypt procedure10. View information about users and processes in the databasesp_who
View information about active users and processes in the SQL
.
View the constraints of a data object in a databaseSp_helpconstraint @ objname
9. view all stored procedures and functions in the databaseUse @ database_nameSp_stored_procedures
View the source code of stored procedures and functionsSp_helptext '@ procedure_name'
View the Data Object Name containing a string @ StrSelect distinct object_name (ID) from syscomments where text like '% @ STR %'
Create an encrypted stored procedure or function with the wi
SQL Server trigger and SQL Server triggerSQL Server triggers
A trigger is a special type of stored procedure, which is different from the stored procedure we introduced earlier. A trigger is triggered by an event and automatically called for execution. The stored procedure c
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