sql server compare two tables for differences

In the process of program development, sometimes you need to directly input data testing programs in the database. If you enter Chinese characters directly in a table in the Microsoft SQL Server database, you may not be able to enter Chinese characters, This seems to be a small BUG. It has been tested several times, and there are several situations below. 1. if you define a field in the table as INT or B

How to obtain the primary and foreign key relationships in SQL Server 2008: Select object_name (con. constid) 'relational name ',Object_name (SF. fkeyid) 'Primary key table ',Fcol. Name 'Primary key ',Object_name (SF. rkeyid) 'Foreign key table ',Rcol. Name 'foreign key ',St. Name 'data type'From sysforeignkeys SFInner join sysconstraints con on SF. constid = con. constidInner join SYS. syscolumns fcol on

First, find the name of the table to be processed or the name of the stored procedure in the system table, and process it with a cursor. PS: sqlserver 2000 uses the system table sysobjects and the type field is xtype. The system table of SQL Server 2005 or later is sys. Objects and the type field is type. This article uses sql2005 as an example. Please replace SQL2000 according to the above instructions

Many software companies understand the importance of developing applications that do not depend on specific database types (such as Oracle, SQL Server, and DB2), allowing customers to choose their preferred platforms. Generally, software developers can identify their customers responsible for database maintenance and must use existing platforms and personalized customers. There have been many articles descr

GAM, SGAM, PAM, IAM, DCM, and BCM are some of the special allocation mapping tables used in SQL Server to manage spatial allocations. Understanding their differences and roles is very important for understanding the SQL Server Phy

during use Select paraid,vvalue, Flowid,id To #wfmw02 from wfmb01c Common functions 1, NVL (expression 1, expression 2); --expression 1 is null return expression 22, Sysdate--system time3, InStr (character expression 1, character expression 2 [, Pos][,nth])Search for the position of "Expression 2" of "Nth" from the pos position of expression 1 (return 0 if not found)4, To_char (), To_date (), To_number () 1, isnull (expression 1, expression 2)2, GETDATE ()3, CHAR

Label:In simple terms, the difference between update and alter, such as Right-click Properties Update Everymatchinfo SET matchno=111--Updating permissions ALTER TABLE EVERYMATCHINFO add IDD INT--Change permissions The actual is the difference between DDL and DML, with some brief instructions DML (Data Manipulation language) is the language of the manipulation: they are select, UPDATE, INSERT, DELETE, just like its name, these 4 commands are the languages used to manipulate the data in the da

)-----ntext; varbinary (max)----image. With large-value data types, it is much more flexible to manipulate large-value data than before. For example: Before the text is not "like", with varchar (max) After the problem, because varchar (max) in the Behavior and varchar (n) The same, so can be used in Varcahr can be used in the varchar (max On In addition, this also supports the use of AFTER triggers on column references to large-value data types in the inserted and deleted

same as the primary key! Both can connect the table and define the rules!The primary key, which must be available in each table, is unique and uniquely identifies each record.Foreign key, the foreign key in one table can only be the primary key in the other table, in general, to delete the primary key in a table must first ensure that there is no same foreign key in the other table (that is, the primary key in the table does not have a foreign key associated with it)Indexes only speed up querie

uncommitted transactions, or committed but not completed transactions, based on which the instance is automatically restored. So far, the SQL Server database has no instance restoration concept.Media recovery is mainly used to damage database files caused by media faults. When a database file, or some content in a file, or a bad disk partition occurs, or the database is damaged by viruses, data is lost, an

Differences between intra-and outer-connection in SQL Server Assume that there are two tables in a database, one is the student table Studentinfo, one is the class table ClassInfo, and the two tables are associated with CLASSID fields. If you are using an i