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Table creation: Create Table user_info (Id integer not null,Username varchar (30) not null,Password varchar (20) not null,Createdate date not null,Status integer not null,Constraint pk_user_info primary key (ID)); Create Table user_info_temp (Id integer not null,Username varchar (30) not null,Password varchar (20) not null,Createdate date not null,Status integer not null,Constraint pk_user_info_temp primar
SQL Server DDL triggers (Trigger)-Create a database-level DDL triggerThe following invokes a trigger for a database when it is created, and writes the user account that created the data table to the event log in Windows.Create TRIGGER
SQL Server DDL triggers (Trigger)-Create a server-level DDL triggerIf you create a server-level DDL trigger, you can track
SQL Server INSTEAD OF UPDATE view trigger problem, sqlserverinstead An error occurs when the system's instead of update view trigger is associated with table UPDATE: Message 414, level
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
CopyCodeThe Code is as follows: Create trigger tr_mastertable_update On mastertable After update As If Update ([type]) -- this trigger is triggered only when the type field is updated. Insert into masterlogtable Select ID
Copy codeThe Code is as follows:Create trigger TR_MasterTable_UpdateOn MasterTableAfter updateAsIf update ([Type]) -- this trigger is triggered only when the Type field is updated.Insert into MasterLogTableSelectId, (Case [Type] when 1 then 'type1'When 2 then 'type2'When 3 then 'type3'When 4 then 'type4'Else 'typedefault'End), NameFrom insertedGo In addition, the
Label:ALTER TRIGGER [dbo]. [Pricerange]on [dbo]. [Tab_saleandcarstyle]For Update,insert,deleteAsdeclare @Saleshop int, @minDfJjSale decimal (18,3), @maxDfJjSale decimal (18,3), @isDfjj varchar (50)Set @isDfjj = ' No ' if exists (select 1 from inserted) begin select @SaleShop =saleshop from Inserted select @minDfJjSale =min (dfjjsale), @maxDfJjSale =max (Dfjj
This article describes the delete and update operations of the simplest SQL triggers. For more information, see this article. This article describes the delete and update operations of the simplest SQL triggers. For more informati
success.Create a trigger with the Create TRIGGER commandThe parameters are described as follows:Trigger_nameis the name of the trigger that the user is creating, must conform to the naming rules for MS SQL Server, and its name mu
To write a trigger: The code is as follows Copy Code Create Trigger BlogdeletOn BlogInstead of deleteAsDelete from Commentwhere Commentblog in (select Id from deleted) Create an UPDATE trigger
Temporarily save inserted or updated record line Q You can check from the inserted table whether the inserted data meets business requirements Q if not, report an error message to the user and roll back the insert Operation Q deleted table Q temporarily saves the deletion or Record lines before update q you can check whether the deleted data meets the business requirements from the deleted table Q if it is
Label:a), First of all, let's say the error phenomenon: Most of the popular Ecshop templates on the market need to execute a paragraph or a few SQL statements to modify the data structure or initialize some of it. Most Ecshop administrators will execute these SQL statements through the Ecshop backend database management SQL query for the sake of convenience. The
SQL Server trigger and SQL Server triggerA trigger is a special type of stored procedure, which is different from the stored procedure we introduced earlier. A trigger is triggered by a
SQL Server trigger and SQL Server triggerSQL Server triggers A trigger is a special type of stored procedure, which is different from the stored procedure we introduced earlier. A
SQL Server trigger instance details, SQL trigger Microsoft SQL Server™2000 provides two main mechanisms to force business rules and data integrity: Constraints and triggers. A
I have been learning about SQL Server recently. I took a test yesterday. It's really not easy. In particular, some complex queries. It makes me dizzy. However, it is also because your knowledge is not solid enough. So today I reviewed the addition, deletion, modification, and query of the T-SQL statement. Many of them are indeed forgotten. Write the result. Don't
Common Oracle SQL statements (1) preliminary understanding of insert delete update (DML) 1. INSERT (statement for inserting records INTO the data table) www.2cto.com A. INSERT data INTO the table:
Label:Operations on the database in SQL Server: To delete a table:DROP table NameTo modify a table:ALTER TABLE table name add column Add column list typeALTER TABLE table name drop column name Deleting a databaseDrop database name CRUD OperationsC--create Add data r--read read Data u--
Label:Let's go on to the LINQ to SQL statement, which we'll talk about Insert/update/delete operations. This is most commonly used in our programs. We look directly at examples.Insert/update/delete operation
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