Updating multiple fields in sql
One of the questions I was asked recently while speaking at the Los Angeles SQL Server Professionals Group and the Orange County SQL Server User Group (*) was regarding the order in which jobs like rebuilding indexes or updating statistics should be executed as part of the database maintenance activities.
In general you should consider the following important points, focusing in the fact that there are two kinds of statistics: index and column statistics.
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My SQL UPDATE using NULL My SQL UPDATE command can be used to update a column value to NULL by setting column_name = NULL, where column_name is the name of the column to be updated.I already know how to update multiple rows using my where clause, but I don't see how to update multiple columns.What is the SQL update syntax to update more than one column?, groups and stores data for each column and then joins all the columns to complete the whole index.This differs from traditional indexes which group and store data for each row and then join all the rows to complete the whole index.