sql server update multiple columns

Summary of SQL server script update for databases. For more information, see. Summary of SQL server script update for databases. For more information, see. Table replication: 1. insert into select statement Statement format: Inse

Tags: process _id update create STS Delete field name stored procedureTransferred from: http://www.maomao365.com/?p=5277Summary:Here's how to add a new field to a table in the "on-line system". System deployment scripts, adding columns to the method:In system script publishing, how to modify and add a stored procedure custom function view, we usually use the following steps to write such a script1 Det

(8000) Select @sql =isnull (@sql + ' union All ', ') + ' select name, [Course]= ' +quotename (name, ' "') + ', [score] = ' +quotename (name) + ' fro M TB ' from syscolumns WHERE name!= ' name ' and id=object_id (' TB ')--table name TB, not including other columns named name ORDER by Colid exec ( @sql + ' ORDER b

immediately when the locked object is not needed, equal to the serializable transaction isolation levelNOLOCK statement execution does not emit a shared lock, allowing dirty reads, equal to the READ UNCOMMITTED transaction isolation LEVELPaglock with multiple page locks where a table lock is usedREADPAST let SQL Server skip any locking lines, perform transaction

Label:An error occurred when the INSTEAD of Update View Trigger association table update originated in the system is as follows: MSG 414, Level 16, State 1, line 1thUpdate is not allowed because the statement updates the view "Vtesttab" and the view participates in the join and has a INSTEAD of UPDATE trigger. So test how the trigger is executed! ~ Description

Summary: The statistics of the query: so far, we have introduced the selection and maintenance of indexes. If appropriate indexes are available and statistics are updated in real time, the optimizer selects useful indexes for query, because the SQLServer optimizer is overhead-based optimization. When data in columns on where and on needs to be displayed in the result set, Summary: The statistics of the query: so far, we have introduced the selection a

Label:　　 1. Introduction T-SQL (Transact structured Query Language) is the standard SQL extension that is the primary language for program and SQL Server communication. The T-SQL language consists mainly of the following parts: Data definition Language (DDL): Used

SQL Server uses triggers to update multi-table views. The procedure is to use the update trigger to generate two virtual tables "inserted" to store the modified data information and the "deleted" table, then, update the corresponding data to the field information in the corr

illustrate the point, take a example, Create Table A (a int, b int, c int, d float, primary key (A, B, c)) Now check the * for the query: Select C, D from A where (a> or a= and (b > 222 or b = 222 and C > 333)) You can have a Table scan op is used, and the Where clause ended up in residue predicate. However, if you are rewrite the query in a equivalent form: Select C, D from A where a> or a= and B > 222 or a= b= and 222 Then The compiler can choose a index seek OP, which is desired. The problem

From: http://www.oecp.cn/hi/zhaolihong/blog/1980 When SQL Server was recently used in projects, it was found that frequent updates and frequent queries cause deadlocks in high concurrency. We usually know that if two transactions insert or modify data to a table at the same time, it will occur when the X lock of the table is requested, and it is already held by the other party. Because the lock is not obta

inconvenient.5. The advantages of GUID: High efficiency, convenient data import and export, the disadvantage occupies a large space, difficult to read.6. The industry mainstream tends to use GUIDs.third, data insertion1. The INSERT statement can save the column name after the token name, but is not recommended.2. If the values of some fields in the inserted row are indeterminate, then insert does not specify those columns.(1)(2)3. You can set a defau

Tags: SP data bs SQL Information Server nbsp First 500Pre-Preparation:Normal table, temporary table: It has statistical information on the two sessions.Table variable: There is no statistical information.--------------------------------------------------------------------------------------------------------------- -----------------------------------Create a scenario for statistics:1. When you create an inde

join [DBO]. ZHONGHE_TAB as z on f. Student ID = Z. Student ID8 order by f. Student ID ASC9 GO10. View the created view:3.2.1. Modify the information of multiple data tables through the view ???? :1 UPDATE [SQL-LI]. [dbo]. [SHITU_FFENSHU_XINXI]2 SET [name] = 'aaaaa', -- this field is in the [information table]3 [average score] = 111 -- this field is in [s

Someone asked why SQL Server data has changed, but why is the best modification date of database files and log files not changed. In fact, this is a normal behavior. The modification date of the SQL Server File is when the SQL Server