thedatingreviewer com - Updating a view mssql
Somewhat related, I often like to write my UPDATE queries as SELECT statements first so that I can see the data that will be updated before I execute. This also has the same limitation as the proprietary Thank you!Sebastian covers a technique for this in a recent blog post: sqlity.net/en/2867/update-from-select This will tend to work across almost all DBMS which means learn once, execute everywhere. Col2 AS _Col2 FROM T1 JOIN T2 ON T1= T2/*Where clause added to exclude rows that are the same in both tables Handles NULL values correctly*/ WHERE EXISTS(SELECT T1. I know this is old, but just wanted to say this one worked for me.
Adding a WHERE clause would limit the result set of the JOINed table as well.
@Roger Ray what version of My SQL and what was your query, as this DOES infact function as stated. Col2)) UPDATE CTE SET Col1 = _Col1, Col2 = _Col2 statement on its own first to sanity check the results but it does requires you to alias the columns as above if they are named the same in source and target tables.
Views can be an effective tool for speeding up your selects and simplifying complex queries.
Learn what indexed views are, where you might want to use them, how to create them, and what constraints exist with their use.
For more information, see WITH common_table_expression (Transact-SQL). For information about table hints, see Table Hints (Transact-SQL).