sql server compare two tables for differences

Have friends often find their own database of all the content to insert some code, if you want to record a table to delete, too much trouble, the following I found in the online can be bulk Delete method, in fact, the batch to replace the malicious code, very fast.DECLARE @t varchar (255), @c varchar (255) Declare table_cursor cursor for select a.name,b.name from sysobjects a,syscolumns b , systypes C where a.id=b.id and a.xtype= ' u ' and c.name/* "U" for the type of data you want to manipulate

Note that this feature is deprecated after SQL2005 because SQL2005 automatically manages which tables reside in memory.Hosting SQL Server data table memory is a feature provided by SQL Server that is rarely involved in the development of a general small system. This document

First SQL statementSelect CompanyName GSMC,ZB Zhibiao from Left Join T_companycode on T_GSNDZB.GSBH=T_companycode.companyidQuery Result:A second SQL statementSELECT min(CompanyName) GSMC,cast(round(sum(T_xstj.hsje)/10000,2) asNumeric -,2)) Ndje fromT_xstj Left JoinT_companycode onT_companycode.companyid=T_XSTJ.GSBHwhere DateDiff( YearSjgetdate())=0 Group byGsbhQuery Result:Statements that are merged int

Label:1. View the user tableSelect from Sys.tables Select from where type='U' Select from where xtype='U' where type or xtype value:U = user table S = system table V = view FN = scalar function TF = table function P = stored procedure TR = Trigger 　　D = defaults or Default constraints PK = PRIMARY KEY constraintF = FOREIGN KEY constraint UQ = UNIQUE constraint SELECT from Information_schema. TABLES2. View ViewSELECT * from Information_schema. Views3. View the table/view fieldsS

Are you struggling to optimize your SQL Server database? If your database contains many very large tables, the partition function can help you a lot ...... [IT expert network exclusive] Are you also struggling to optimize your SQL Server database? If your database contains

// SQL Server"Connection" connectionstring="Data Source=.; I Nitial catalog=db; User Id=sa; Password=sa "providername="System.Data.SqlClient"/>// SQL Server 2005"Connection" connectionstring="Data Source=. \sql2005; Initial catalog=db; User Id=sa; Password=sa "providername="System.Data.SqlClient"/>named instances are d

tables, when adding records at different times, the programmer to use different SQL statements, such as when adding records in 2011, the programmer to add records to the 2011 table, in 2012 to add records, The programmer wants to add the record to the 2012 table. In this way, the programmer's workload increases and the likelihood of errors increases.The use of partitioned

speed of the Owa_opt_lock.checksum function. The top in 5.sqlserver is replaced with rownumin Oracle . the character comparison in the Ora CLE is case-sensitive by default, and SQL Server is configured by default and is case insensitive. the length of the object (column name, etc.) in the Ora CLE cannot exceed 30. If the column name contains spaces, you can use "" and use [] in

(1) system table: stores all SQL system information. The metadata stored in the database service is called metadata (for example, the user databases on the data server, the login accounts on the database server, and (1) system table: stores all SQL system information. The metadata stored in the database service is call

Introduction: SQL Server and Microsoft Access are both Microsoft products. The former is used for medium-sized enterprise applications, and the latter is representative of small databases, which is easy for beginners to master. When developing general information systems, especially the standalone version, most of them use access. Although SQL

The T-SQL statement that deletes the table is:DROP table Drop is discarded, and drop table means that a table is completely erased.There are two ways to delete table data: Delete and truncate.The use of delete is as follows:Delete from The usage of truncate is as follows:TRUNCATE TABLE The difference between delete and truncate is as follows:1. Delete can delete one or more data from a table, or delete all data, and truncate can only delete all the da

SQL Server triggers enable simultaneous addition, deletion, and update of multiple tables Definition: What is a trigger? In SQL Server is a certain operation of a table, triggering certain conditions, thus executing a program. A trigger is a special stored procedure.There a

requires understanding the concepts of files and filegroups in SQL Server.Partitioning a table needs to be used in a variety of scenarios. In general, the use of table partitioning is primarily used for: Archiving, such as the distribution of data from 1 years ago in a sales record to a dedicated archive server Easy to manage, such as dividing a large table into several small

The following SQL statement passed the test in Access XP Query Table creation: Create Table tab1 ( Id counter, Name string, Age integer, [Date] datetime ); TIPS: Use counter to declare the auto-increment field. Fields with field names as keywords are enclosed in square brackets []. It is also feasible to use numbers as field names. Index creation:The following statement creates a repeatable index on the date column of tab1Create index idate on

Label:0. ReferencesTable Scan, Index Scan, index Seek SQL Server–index Seek vs. Index Scan–diffefence and Usage–a simple Note How Oracle tables are accessed Difference between index seek and index scan and where applicableHow to access tables in 1.oracleIn Oracle, where table access is described, the data in the Access

Tags: blog http io ar os using SP for strongpartition table in SQL Server 2005 (a): What is a partitioned table? Why use partitioned tables? How do I create a partitioned table? Category: SQL Server2009-12-03 10:17 15325 People read comments (+) Favorites report SQL

The presence of SQL Server data tables in memory is a feature provided by SQL Server that is rarely expected to be involved in the development of a general small system. This paper collates the relevant documentation to show how to put all the data of a table in

Master Database The master database records all system-level information of the SQL server system. It records all logon accounts and system configuration settings, and all other databases, including the location of database files. The master database records the initialization information of SQL server. It always has a

Temporary tables vs. Table variables and their impact on SQL Server Performance -- Wang Chenghui translation finishing, post please indicate from Microsoft Bi pioneer http://www.windbi.com/--Original post addressIn the temporary tableCreate Table # T (...)And table VariablesDeclare @ t table (...)There are three major di