Updating two tables in a single query in sql is online dating worth it
Performs insert, update, or delete operations on a target table based on the results of a join with a source table.For example, you can synchronize two tables by inserting, updating, or deleting rows in one table based on differences found in the other table.In this article I will show you a number of different ways to use the UPDATE statement to modify the data in your SQL Server tables.There are multiple ways to use the UPDATE statement to update a SQL Server table.Any data that violates any unique index will cause the same problem. For example, I might export some data to a spreadsheet, send it to a client, and the client might update or add some data and return the spreadsheet to me.That’s a terrible way to update data, but for various reasons, I’m sure many readers have found themselves in a similar situation.If you are an application programmer then you will more than likely need to write TSQL code to update your SQL Server database tables.
I have to start with one spreadsheet, then insert and/or update the differences from the others.Below is the TSQL code to create and populate this table.These two different tables will be used in my UDPATE statement examples below.to allow inserting and updating exactly the desired data.These features provide a lot of power and flexibility, making My SQL significantly more capable than it otherwise might be.
Bill Koster CSC/DECC" id="ctl00_m_m_i_ctl00_gr_ctl07_bestanswerbody" class="textarea-bestanswerhidden" name="bestanswerbody" answerbody Id="5190413" / update (select a.i as a, b.i as b from a,b where a.i=b.i) set b=-1; HTH Ananthram" id="ctl00_m_m_i_ctl00_gr_ctl09_bestanswerbody" class="textarea-bestanswerhidden" name="bestanswerbody" answerbody Id="5190429" / update a,b set a.col5=-1,a.col7=b.col7, a.col8 = b.col8 where a.col1 =b.col1 and a.col2=b.col2 it works much faster then using "exists" if there are indexes on link columns.