create trigger sql server after update

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

The recent use of SQL Server in project-on-line usage has found that frequent updates and frequent queries cause deadlocks in high concurrency situations. Usually we know that if two transactions are inserting or modifying data on a table at the same time, it will occur when the X lock on the table is requested and has been held by the other party. Because the lock is not available, subsequent commits can

Today I want to talk about a particular problem that I will encounter every time I talk about lock and block (Locking Blocking) in SQL Server: Why do we need to update the lock in SQL Server? Before we explain the reasons for the specific needs, first I would like to introd

in the database (that is, any DDL statements can be executed). --Create a login userCreate Login DivinerWithPassword= ' 825991 ',Default_database=wangping --Use stored procedures to grant the diskadmin role to the newly signed-in userEXEC sp_addsrvrolemember ' diviner ', ' diskadmin ' --Create a database account for the login account, complete the login user's and Database account mapping, the general reco

In the past, SQL Server only performed operations on the graphic interface. Now I find that my SQL language skills are getting worse and worse. For example, how to add associations for two tables, cascade update and delete. I checked it at night and found that two methods can be used.

I think a lot of people know that in Oracle, stored procedures can be passed in an array (such as int[]), that is, you can pass multiple records to the data to update together. Reduce the number of requests to the database. But what about SQL Server? Bulk INSERT This is a lot of people know, I also know, but unfortunately, I have never used, only to guide the dat

The basic algorithm for automatically updating statistics is: · If the table is in the tempdb database table the cardinality is less than 6, automatically updated to the table for each of the six modifications. · If the base of the table is greater than 6, but less than or equal to 500, update the status every 500 of the modifications. · If the cardinality is greater than 500, the table changes when the statistics are updated (tables of 500 + 20%). ·

Grammar The code is as follows Copy Code CREATE or REPLACE TRIGGER trigger_nameAfter INSERTOn table_name[For each ROW]DECLARE--Variable declarationsBEGIN--Trigger codeEXCEPTIONWhen ...--Exception handlingEnd; Look at an example For Example Create a data table with the following

not NULL) UseE_market--Add columnar alter+table+ table name +add+ new column name + data typeAlter TableUserInfoAddEmailvarchar( -)Alter TableUserInfoAddUserAddressnvarchar( $)Alter TableUserInfoAddPhonevarchar( -) not NULLCreate TableOrderInfo (OrderIDint Identity(1,1)Primary Key not NULL,--Order NumberUseridvarchar( -) not NULL,--member accountCommodityidint not NULL,--Product numberAmountint not NULL,--QuantityPaymoneybigint not NULL,--Payment AmountPaywayvarchar( -) not NULL,--Payment

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