Oracle update statement not updating

Note, however, that the data is slightly different in the Adventure Works database from what’s stored in the Adventure Works2008 database, so your results will be different than what is shown here. (Only the last example might need to be modified, which I’ll explain when we get to it.) To try out the examples in the article, you must first create the Sales Staff table, as shown in the following Transact-SQL code: Notice that I tag on a SELECT statement at the end of the code to retrieve the new content in the Sales Staff table.What I love about writing SQL Tuning articles is that I very rarely end up publishing the findings I set out to achieve. We have a table containing years worth of data, most of which is static; we are updating selected rows that were recently inserted and are still volatile. For the purposes of the test, we will assume that the target table of the update is arbitrarily large, and we want to avoid things like full-scans and index rebuilds.When using ORM tools, it is a good practice to occasionally enable query logging in a development environment to verify the generated SQL statements.The tip entitled “Markus Winand teaches efficient SQL—inhouse and online.

Since version 4.0, this mode is enabled by default.” by Markus Winand is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 Unported License.In most cases, when using Transact-SQL to modify data in a SQL Server database, you issue an UPDATE statement that changes specific values.An UPDATE statement must always include a SET clause, which identifies the columns to be updated.In addition, the statement can include a WHERE clause, which determines what rows to modify, or a FROM clause, which identifies tables or views that provide values for the expressions defined in the SET clause.

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