Sql updating multiple rows

Posted by / 16-Sep-2017 07:07

The code you posted doesn't have a sub-query, and an UPDATE statement cannot be a subquery.-- Rod at work Check out these links on how to get faster and more accurate answers: Forum Etiquette: How to post data/code on a forum to get the best help Need an Answer? You Need a Question How to Post Performance Problems Crosstabs and Pivots or How to turn rows into columns Part 1Crosstabs and Pivots or How to turn rows into columns Part 2 I know that code doesn't have a subquery, I stated that I also tried a subquery using where exists.If you think its expensive to hire a professional to do the job, wait until you hire an amateur.Introduction to SQL SQL Lesson 1: SELECT queries 101 SQL Lesson 2: Queries with constraints (Pt. 2) SQL Lesson 4: Filtering and sorting Query results SQL Review: Simple SELECT Queries SQL Lesson 6: Multi-table queries with JOINs SQL Lesson 7: OUTER JOINs SQL Lesson 8: A short note on NULLs SQL Lesson 9: Queries with expressions SQL Lesson 10: Queries with aggregates (Pt. 2) SQL Lesson 12: Order of execution of a Query SQL Lesson 13: Inserting rows SQL Lesson 14: Updating rows SQL Lesson 15: Deleting rows SQL Lesson 16: Creating tables SQL Lesson 17: Altering tables SQL Lesson 18: Dropping tables SQL Lesson X: To infinity and beyond! Target Table AS tgt INNER JOIN ( VALUES (1, 'a', 'k', 'x', ...), (2, 'b', 'l', 'y', ...), (3, 'c', 'm', 'z', ...) ) AS src (ID, Column1, Column2, Column3, ...) ON tgt. When you write the code for a DML trigger, consider that the statement that causes the trigger to fire can be a single statement that affects multiple rows of data, instead of a single row.Purchase Order Header SET Sub Total = Sub Total (SELECT SUM(Line Total) FROM inserted WHERE Purchase Order Header. USE Adventure Works2012; GO CREATE TRIGGER New PODetail3 ON Purchasing.

What I really want to know is if it is even possible to run one update query to update multiple distinct rows or if I need to do a loop.

However, because an INSERT trigger can be fired by an INSERT INTO () SELECT statement, the insertion of many rows may cause a single trigger invocation.

Multirow considerations are especially important when the function of a DML trigger is to automatically recalculate summary values from one table and store the results in another for ongoing tallies.

Purchase Order Header SET Sub Total = Sub Total Line Total FROM inserted WHERE Purchase Order Header. Purchase Order ID END ELSE BEGIN UPDATE Purchasing.

Purchase Order Header SET Sub Total = Sub Total (SELECT SUM(Line Total) FROM inserted WHERE Purchase Order Header.

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This can also be used to change the column to NULL if the column has no default and is defined to allow null values.