create trigger sql server after update

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 SQLServer file is in SQLSer Someone asked why SQL server data has changed, but why is the best modification date of database

] SET [createdate] = GETDATE ()2. Specify calculated valuesUPDATE [dbo]. [Product] SET [unitprice] = [unitprice] * 23. Updating with default valuesThe default value for column CreateDate is set to GETDATE (), and the default value is null if not set.UPDATE [dbo]. [Product] SET [createdate] = DEFAULT4. Where condition limits update multi-column fieldsUPDATE [dbo].[Product]SET [ProductName] = 'LINQ to SQL',[U

SQL Server 2016 installation error prompt: You need to install oracle JRE7 update 51 (64-bit) or a later version to solve the problem, 2016jre7 Cause of error: JDK is not installed on the computer and is in version 7) Solution: Install JDK on the following website, configure environment variables, and reinstall SQL

speed of SQL, stored procedures are compiled, if an operation contains a large number of SQL code or executed several times, then using a stored procedure is faster than the direct use of a single SQL statement execution.3, reduce the burden of the server: When the user's operation is against the database object opera

Label:One, MS SQL Server Multi-Table Association updateSQL Server provides the FROM clause of the update, which connects the table that will be updated to its data source. Although only one table can be updated, it is possible to reference data other than the table to be updated in an

Aliases cannot be used for tables in update statements in SQL ServerEg:update Table A set a.column= "" where ...This is not true in SQL Server (it can be in Oracle), and you can't use aliases for tables. This is because the UPDATE statement we've been writing is abbreviated

There are two lock classification methods.(1) from the perspective of the Database SystemThere are three types of locks:• Exclusive Lock)A resource with an exclusive lock can only be used by locked programs. Other operations on the resource are not accepted. SQL Server automatically uses an exclusive lock when executing the data UPDATE command, namely the INSERT,

Scenario: Record the ID of the change in the Users_log table when the users table is Insert,update,delete Creation of MySQL triggers Trigger Time: Before,after Trigger Event: Insert,update,delete NEW and Old keywords: | Action | NEW | Old | |--------|----------------|----------------| | Insert | New Data to inse

Label:I have long been engaged in ASP. NET development, often update the database design of different environment (dev,uat,staging,production). After a long time, it is very painful and tedious to update the database fields when the server is maintained, which often misses the update of a field in a table and causes th

, @ objectID END CLOSE publish_cursor DEALLOCATE publish_cursor GO Select p. publishid, p. contentid, a. contentid, p. objectID, a. articleID from publish p Inner join articles a on a. articleID = p. objectID Where objectid> 0 and p. contentid And (p. cellid = 160 or cellid = 138) Go -- Update publish set contentid = 0 where (cellid = 160 or cellid = 138) -- Select * from publish p where (p. cellid = 160 or cellid = 138) Is there any better way?Y

Label:Pros: Allows data to be read (without blocking other transactions) and update data at a later time, ensuring that data has not been changed since the last time the data was readWhen you use Updlock to read a record, you can add an update lock to the record that is fetched, and the record of the lock cannot be changed in other threads until the transaction at the end of the thread ends.BEGIN TranSELECT