TheMERGE INTOstatement, also known asUPSERT(update or insert), allows us to update existing records or insert new records based on a condition. Additionally, we can use theMERGE INTOstatement with other clauses such asUSING,WHEN,THEN, andSETto update data from one SQL table to another based...
We want toMERGE INTO(UPDATE/INSERT) thebookstable by using the secondaryauthorstable, and we’re matching the two based on the samebooks.author_id = authors.idcomparison. 我们想要使用辅助表authors表来MERGE INTO(UPDATE/INSERT)books,并且我们基于相同的books.author_id = authors.id比较来匹配两者。
We want toMERGE INTO(UPDATE/INSERT) thebookstable by using the secondaryauthorstable, and we’re matching the two based on the samebooks.author_id = authors.idcomparison. 我们想要使用辅助表authors表来MERGE INTO(UPDATE/INSERT)books,并且我们基于相同的books.author_id = authors.id比较来匹配两者。
Returns updated data or expressions based on it as part of the UPDATE operation. The OUTPUT clause isn't supported in any DML statements that target remote tables or views. For more information about the arguments and behavior of this clause, see OUTPUT Clause (Transact-SQL). FROM <table_sou...
A SQL update with join is a query used to update the data in a table based on data in another related table. The join is used to associate records in one
Update data using JOIN After going through some basics, let’s see SQL UPDATE syntax on how to do updates based on joins. This can be a really neat thing to do because a lot of times when updating data in a table we need data from another table to make desitions on what you’re...
7. If the view you want to update is based upon another view, the later should be updatable. 8. Any of the selected output fields (of the view) must not use constants, strings or value expressions. Syntax: UPDATE < view_name > SET<column1>=<value1>,<column2>=<value2>,... WHERE...
That was quite easy, but let’s suppose that we need to an UPDATE based on another big table and use the value in the other table. Suppose that we would like to do the same UPDATE like we did with the CTE on SQL Server, we can overcome the JOIN problem with this code: ...
Can I UPDATE, then INSERT if no record updated? Can I use a COLLATE clause in a temp table definition? Can I use aggregate function within CASE? Can I use if statement in a table valued function? Can I use LEN or DATALENGTH in a WHERE clause? Can I use OUTER JOIN on 2 columns at...
INSERT INTO EmpLog(EmployeeID, FirstName, LastName, HireDate, Operation, UpdatedOn, UpdatedBy) SELECT EmployeeID, Firstname, LastName, HireDate, 'INSERT', GETDATE(), SUSER_NAME() FROM INSERTED; GO Now that we have our two tables and trigger created on our “Employee” table, let’s ...