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How to write an efficient SQL script II 12. View Use a view as few as possible, and its efficiency is relatively low. Operations on a view are slower than operations on a table. You can replace it with stored procedure. In particular, do not use nested views. nested views increase the difficulty of searching for original data. Let's look at the essence of the View: it is an optimized
The following script performs a full backup of a database in SQL Server and passes the backup file to another machine. Backup file naming rule: Database name _ timestamp. Bak. Execution Environment: Windows 2003 Server SQL Server 2000 @ECHO offREM Backup Database Script Lo
The SQL script running FOR 10 Gb IN oracle9i environment is incompatible. There is no problem IN running the SQL script IN oracle10g environment. The following is the SQL code FOR C IN (SELECT * FROM TABLE (pkg_rj_common.f_split (P_IN_IDS _, ',') LOOP .... The end loop is om
MySQL import (execute) SQL scriptFor example, if my user name is root and the password is 123 SQL script, the C disk name is test. The SQL database name is test. There are two ways to execute the script 1: Open CMD and enter the following command (directory conversion is n
Use the query analyzer to adjust the SQL Server script. I like to think of the tools bundled with SQL servers as inverted pyramid. tools for diagnosing and checking general problems are at the top, and tools for finding and diagnosing specific areas of problems are at the bottom. Apart from mentioning that I like to regard the tools bundled with
Enterprise Manager--Management--sql Server Agent--Right-click Job--New job--Enter the job name in the "General" entry--"Step" item--New--Enter the step name in step name--SELECT "Transact-SQL script (TSQL)" in "type"--"Database" Select the database that executes the command--Enter the statement to execute in the command:-Determine--"Dispatch" item--New schedule--
most primitive, backward. is also the most prone to error writing: First it is not specified in the code in the database execution, sometimes people are very careless, open the file is executed, it is possible to build the table to master or other database. Second, when the batch is built, if the table already exists in the database. will affect the execution. So we can improve the way it is written.Use My
negative integer that is specified as the location of the name, alias, or expression within the selection list.ASC: Sorts the values in the specified column in ascending order.Desc: Sorts the values in the specified column in descending order. Seven, having a filter querySee address:http://www.cnblogs.com/kissdodog/p/3365789.htmleight, into queryThe INTO clause generates a new table for the query results, and the structure of the new table consists of a list of query fields. You can also
Tags: Export database technology share nload Images Client Server man case parametersI copy the schema and data of a database into a script, and then I create a new database to execute the script, but I am prompted with the following error: Problem Description: When a client server does not allow direct backup, it is often deployed by exporting database scripts-restoring the database, However, when the da
change TRACKING--Viewing changes trackingAlter---ModifyUpdate---UpdatesTake OWNERSHIP---takeover ownershipControl---ControlsDelete---RemoveSelect---SelectionREFERENCES--References ----The permissions that a stored procedure hasView DEFINITION---ViewingAlter---ModifyTake OWNERSHIP---takeover ownershipControl---ControlsExecute---Execution -----Permissions for scalar functions View definition---Viewing definitionsAlter---ModifyTake OWNERSHIP---takeover
Java: Drop the. bat file that executes the SQL script Java drop. bat file SQL scripts are stored in D: sqlplustest. SQL Insert into ss values (11 ); Insert into ss values (12 ); Insert into ss values (13 ); Commit; Exit; SQL. bat script
Label:What is a script. We learned in front of the Create TABLE Create variable: DECLARE statement most commonly used syntax: DECLARE @ DECLARE @TotalCount int=0--Create a variable and initialize the value (SQL server2008 the following database error) Select @TotalCount--Output 0 SET @TotalCount =10-- Set variable value to 5 Select @TotalCount-Output @TotalCount =count (*) from dbo.test003 Select @TotalCo
/// /// Read the SQL script file. Note: The file is saved in UTF-8 format./// Each Execution Unit ends with an exclusive go/// Perform operations such as table creation and table structure modification./// /// /// Public static list {If (! File. exists (varfilename )){Return NULL;} Streamreader sr = file. opentext (varfilename ); List String commandtext = "
(' 9787121042621 ', ' Spring 2.0 core technology and best practices ', the the' Xuefeng Liao ', ' electronic industry Press ', ' 2007-6-00 ', 509, About the' Computer class ', 59.80 ); the theInsert into book values (' 7505380001 ', ' Java and Patterns ', + -' Shanhong ', the Bayi' Electronics Press ', ' 2002-10-00 ', 1024, the the' Computer class ', 88.00 ); - -Insert into book values (' 9787302167792 ', ' VB 2005 . NET 3.0
Write a. sql script file with notepad++:1 Drop Database if exists library;2 Create DatabaseLibrarydefault character SetUTF8;3 UseLibrary;4 5 Create Table User(6Idint( One) not NULLAuto_increment,7Namevarchar(255)default NULL,8Passwordvarchar(255)default NULL,9 Primary Key(ID)Ten) engine=InnoDBdefaultCharSet=UTF8;Save to the F drive in the SQL folder named Cr
Label:1, index is critical, create a reasonable index, improve query speed; DBCC freeporccache dbccdropcleanbuffers nbsp; SET statinstic IO on SET statinstic IO off 1> query, where The statement also involves whether the query uses an index lookup or an index scan; 2> uses the SQL real-time query tool to analyze query performance, using an index performance higher than scanning the disk; 3>where Try not to use a calculated expression s
management tool pl-sql Developer tool for data import, in order to finalize the entire process. This operation is also somewhat fastidious.For example, if we create different kinds of database scripts, we just need to join in order or choose to execute database script.So what do you do with these SQL, do you just drag them onto the pl-sql?Of course not, otherwis
Background:In the process of doing the project, the Hive table is not a non-Chinese text segment. In the recently done project encountered the need to execute the query script on the Beeline interface, but the script contains Chinese, the normal script is written in text, paste into the Beeline window run, found that Chinese is garbled, and the carriage return
Label:After logging into the database with Sqlplus, type: @/full path/file name to execute *.sql fileExample assumes that there is a Test.sql file where the path is/home/oracle/now to execute it1 Logging into the databaseSqlplus System/manager2 after the prompt sql>, typeSql> @/home/oracle/test.sql;After logging into the database with Sqlplus, type: @ file name full path to execute *.sqlThingExample assumes
;}return stroutput;}}}The parameters for osql are named as follows:=====================Usage: osql [-u login ID] [-p password][-s server] [-H hostname] [-E Trusted Connection][-D use database name] [-L Login Timeout] [-t query timeout][-H headers] [-S Colseparator] [-W ColumnWidth][-A packetsize] [-e echo input] [-I Enable Quoted Identifiers][-l list Servers] [-C Cmdend] [-D ODBC DSN name][-Q "CmdLine query"] [-Q "CmdLine query" and exit][-N Remove numbering] [-M ERRORLEVEL][-R msgs to stderr]
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