Sql updating multiple tables

01 May

We will discuss how you can use the global temporary tables (GTT) syntax to improve the speed of queries that perform complex summarization activities, and how to speed up two-stage queries that perform both summarization and comparison activities.

Requesting a "estimated" plan does not involve executing the query, naturally.

You must also know SQL if you write programs that use the My SQL interface provided by your programming language because the interface functions as the means that allows you to communicate with the server by sending SQL statements to it.

Chapter 1, "Getting Started with My SQL and SQL," presented a tutorial introduction to many of My SQL's capabilities.

id Data, -- PK of main table tab Data fi SL, fi Model, fi Claim Status -- FK to dim Claim Status FROM tab Data AS d INNER JOIN loc SL AS sl ON SL = SL INNER JOIN loc GSP AS gsp ON GSP = GSP INNER JOIN loc Country AS c ON Country = Country INNER JOIN loc Market Unit AS mu ON Market Unit = Market Unit INNER JOIN mod Model AS m ON Model = Model INNER JOIN dim Claim Status AS s ON Claim Status = Claim Status INNER JOIN tdef Product Type ON Product Type = tdef Product Product Type LEFT OUTER JOIN tdef Service Level ON d.fimax Service Level = tdef Service Service Level LEFT OUTER JOIN tdef Action Code AS ac ON d.fimax Action Code = Action Code UPDATE tab Data SET fi Claim Status = (SELECT id Claim Status FROM dim Claim Status WHERE Claim Status Name = 'Awaiting auth.') WHERE fi Claim Status=(SELECT id Claim Status FROM dim Claim Status WHERE Claim Status Name = 'Approved') updatable in practice, due to limitations of the query processor's reasoning.

Cross table update (also known as correlated update, or multiple table update) in Oracle uses non-standard SQL syntax format (non ANSI standard) to update rows in another table. Update data in table A based on two or more common columns in table B.