sql beautifier

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

Chapter 1 Basic SQL statements (Basic SQL statements) and Chapter 1 Basic SQL statements 1. query the database system time, which is usually displayed in the default format of the server (depending on the character set of the database );Note: dual is a virtual table in the database and belongs to the Administrator sys user, but all users can access it. It has no

Connect to the SQL server lock mechanism (I)-Overview (lock type and scope) Ii. Complete lock compatibility matrix (see) Correct Code Description: see. III. The following table lists the resources that can be locked by the database engine. Name Resources Abbreviations Encoding Specifies the method to describe the resource when a lock is presented. Description Data row RID RID 9 File No.: Page No.: Slot

Java. SQL. SQLException: ORA-00604: recursive SQL Level 1 error, recursive SQL Level 1 error The following error is reported in the background: Caused by: java. SQL. SQLException: ORA-00604: recursive SQL Level 1 error ORA-01000: exceeds the maximum number of opened cursors

Tags: User bar implicit conversion first location assignment set size getWhat is a cursor The result set, which is the collection of all row data returned after the select query. Cursors are a mechanism for working with result sets, which can locate a row in the result set, read or write multiple data, or move the cursor to navigate to the rows you want to manipulate the data. Generally complex stored procedures, there will be the appearance of cursors, his main use is: Navigates to a

Original: SQL Drip 38-sql Server 2008 and SQL Server R2 options for exporting data are slightly differentDescriptionpreviously, to export data from a table as a script, only with stored procedures. A new feature is now added in SQL Server 2008, which supports exporting data from tables to scripts in addition to the def

1. Problem: PL/SQL beautification cannot parse textThe original SQL statements are as follows:CREATE OR REPLACE VIEW V_GGXZBM asSELECT Xzbm,xzmc,case when PARENTXZBM was NULL then ' 320000 ' ELSE parentxzbm END parentxzbm,pxxh from SYS_XZBMB WHERE issh ow= ' 1 'UNION SELECT ' 320000 ' xzbm, ' All ' xzmc, ' parentxzbm,0 pxxh from DUAL;Click on the beautification device does not respond, the status bar shows:

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

Tags: free ODBC freetds tle project download server using HTTPSSQL SQL statements and stored procedures for SQL Server execution with FreeTDS under Linux Http://www.linuxidc.com/Linux/2012-06/61617.htm FreeTDS related Http://www.knowsky.com/616936.html The shell accepts the value returned by the stored procedure Http://blog.chinaunix.net/uid-22948773-id-3318716.html MyBatis call stored procedure and return

SQL is required. Take notes. Chapter 2 describes advanced SQL features. SQL is required.22.1 Constraints To correctly design a relational database, you need to ensure that only valid data is inserted in the table. For example, if the Orders table stores order information and the OrderItems table stores order details, ensure that any order IDs referenced in Orderi

Label:Rebuild Package Name Org.hibernate.type.descriptor.sql Rebuilding class Basicbinder The code is as follows Package org.hibernate.type.descriptor.sql; Import java.sql.PreparedStatement; Import java.sql.SQLException; Import org.hibernate.internal.CoreLogging; Import Org.hibernate.type.descriptor.JdbcTypeNameMapper; Import Org.hibernate.type.descriptor.ValueBinder; Import org.hibernate.type.descriptor.WrapperOptions; Import Org.hibernate.type.descriptor.java.JavaTypeDescriptor; Import Org.j

SQL Server-Basic-classic SQL statements, server-SQL 1 classic SQL statement 2 basics 3 1. Description: CREATE DATABASE 4 CREATE database-name 5 2. Description: delete DATABASE 6 drop database dbname 7 3. Description: back up SQL server 8 --- create device 9 USE master 10 EXE

A few questions about SQL (SQL advanced) and SQL advanced When we get a question, we are not eager to answer the question. It will not be worth the candle, but to analyze the ideas, methods, and objectives, we also need to think about whether there are simple methods or general methods to achieve the same effect. In fact, this kind of inertial thinking was introd

like '% @ str %'Create an encrypted stored procedure or function WITH the with encryption parameter before theYou can use sp_decrypt to decrypt encrypted stored procedures and functions.10. View user and process information in the databaseSp_whoView information about active users and processes in the SQL Server databaseSp_who 'active'View the locks in the SQL Server databaseSp_lockProcess No. 1--50 is used

Often develop ASP but for the meticulous statement, the truth is not very clear, here a simple introduction. Under normal circumstances Read the data with Rs.Open sql,conn,1,1 Modifying data: Rs.Open sql,conn,1,3 Delete data: Directly to Conn.execute ("Delete * from new where id=1"). The Rs.Open syntax is as follows: Rs. Open Source,activeconnection,cursortype,locktype Source is a