Label: Database parameterized mode There are two ways to parameterize a database, simple and mandatory (forced), and the default parameterization is "simple" by default.In simple mode, if the SQL is sent every time, unless it is exactly the same, it will be recompiled (special circumstances will be automatically parameterized, it is the focus of this article)The mandatory mode is to force the Adhoc SQL to b
MS SQL Server Query optimization methodThere are many reasons for the slow speed of queries, which are common1, no indexes, or no indexes (this is the most common problem with query slowness, is the flaw in programming)2, I/o throughput is small, creating a bottleneck effect.3, no computed columns are created causing the query to be not optimized.4, Low memory5, network speed is slow6, query out the amount of data is too large (you can use multiple qu
Database parameterized modeThere are two ways to parameterize a database, simple and mandatory (forced), and the default parameterization is "simple" by default.In simple mode, if the SQL is sent every time, unless it is exactly the same, it will be recompiled (special circumstances will be automatically parameterized, it is the focus of this article)The mandatory mode is to force the Adhoc SQL to be parame
"Customer Name": Guizhou Tongren driving Person Training Center"Software name": UF T3 Universal Edition"Database Version": MS SQL Server 2000 "database size": 1GB X 6 (3 accounts for a total of 6 years)."Problem description": Due to server poisoning or Kaka, the customer sent the server computer to the installed shop to redo the operating system. Not detailed to inform the use of the computer, resulting in the entire hard drive by the repair shop tech
C # convert SQL statements into paging SQL statements and obtain the number of records SQL statements
/// /// Convert the statement into a paging SQL statement. Two SQL statements that contain paging data are used to obtain the number of records.
1. view the database version
Select @ version
Common SQL server patch versions:
8.00.194 Microsoft SQL Server 2000
8.00.384 Microsoft SQL Server 2000 sp1
8.00.532 Microsoft SQL Server 2000 sp2
8.00.760 Microsoft SQL Server 2000 sp3
8.00.818 Microsoft
SQL Server manages common SQL and T-SQL (2)
1. view the database versionSelect @ versionCommon SQL server patch versions:8.00.194 Microsoft SQL Server 20008.00.384 Microsoft SQL Server 2000 sp18.00.532 Microsoft
Tags: nbsp play clob Introduction ring LAN Solution Help SED 1. Brief introduction Oracle DATABASE11GR1 introduces SQL Planmanagement (SPM), a set of new tools that allow DBAs to capture and maintain discretionary SQL statements to run the best plan, limiting refresh optimizer statistics. There has been an application change. Even the impact of a database version number upgrade. This article helps to unders
conversion from: http://www.51testing.com /? Uid-239867-action-viewspace-itemid-103705
SQLDifferences between statements, PL/SQL blocks, and SQL * Plus commands
The SQL statement isDatabaseThe language of the operation object, including the data definition language DDL, data manipulation language DML, Data Control Language DCl, and data storage
SQL Server quickly generates SQL addition, deletion, modification, and query statements, and SQL addition and DeletionAre you still coding to generate SQL statements? Are you still speechless for SQL statements that are sloppy? Are you still struggling with expressing compli
In the previous chapter, we have introduced how to create an SQL azure database. This chapter describes how to use SQL Server Management Studio (SSMs) to connect to and manage SQL azure databases. Install SQL Server manage studio to prepare the teaching content.
1. First we log on to the Windows azure user management
Label:The more written the SQL script, the more often it feels that writing is too inefficient, regardless of the speed of the typing. When I personally write SQL scripts, I will at least arrange the SQL format to be easy to read, because others will read your SQL, whether in the program or in the script file, good typ
Cannot Debug SQL: Unable to start T-SQL Debugging. cocould not attach to SQL Server process on, t-sqldebuggingWhen SSMS debug SQL script is used today, an error is reported: Unable to start T-SQL Debugging. cocould not attach to SQL
This article explains how to split an SQL statement with one or more left JOIN or right join into multiple SQL statements. MySQL query efficiency is very low, especially large data, and high concurrency, the index can not solve the problem, the best way is to split the SQL statement into multiple single table query SQL
handling of column fields SQL Case Do the column processing Sql> Select deptno,sum (SAL) from the EMP Group by DEPTNO; Select Case When deptno=10 Then ' ACCOUNTING ' When deptno=20 Then ' Reserch ' When deptno=30 Then ' SALES ' End sum (SAL) from EMP GROUP BY Deptno
handling of column fields SQL Decode There is also the case that when nothing
Use of PL/SQL DBMS_ SQL package (1) (Study Notes), pldbms_ SQL
Dbms_ SQL packageThe dbms_ SQL package is another method provided by the system to use dynamic SQL:Follow these steps to use the DBMS_ SQL package to implement dynamic
Alias for SQL1. You cannot use the alias of the column name in the WHERE clause, that is, the select name T from EMP where t>2999; is not allowed2. Benefits of using aliases:Improve the readability of SQLImprove the efficiency of SQL parsing executionGrammar checkSemantic checkShared Pool ChecksBuild the execution treePerform3. Hard parsing and soft parsing of SQL?Execution Order of SQL1. From statement--wh
1. View the version of the database
SELECT @ @version
Several common SQL Server patched version numbers:
8.00.194 Microsoft SQL Server 2000
8.00.384 Microsoft SQL Server SP1
8.00.532 Microsoft SQL Server SP2
8.00.760 Microsoft SQL Server SP3
8.00.818 Microsoft
1. View the version of the database
SELECT @ @version
2. View the machine operating system parameters of the database
EXEC master.. xp_msver
3. View Database Startup Parameters
sp_configure
4. View Database Startup time
Select CONVERT (varchar, login_time,120) from master. sysprocesses where spid=1
To view the database server name and instance name
print ' Server Name ... ...: ' + CONVERT (varchar (), @ @SERVERNAME) (@, @)
print ' Instance ... ...: ' + CONVERT (varchar) (@ @SERVICENAME)., D., ".
server| Data | database | statement
1. View the version of the databaseSELECT @ @version2. View the machine operating system parameters of the databaseEXEC master.. xp_msver3. View Database Startup Parameterssp_configure4. View Database Startup timeSelect CONVERT (varchar, login_time,120) from master. sysprocesses where spid=1To view the database server name and instance nameprint ' Server Name ... ...: ' + CONVERT (varchar (), @ @SERVERNAME), ".print ' Instance ....: ' + CONVERT (varchar), @ @S
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