Read this SQL tutorial to learn when to use SELECT, JOIN, subselects and UNION to access multiple tables with a single statement. It’s sometimes difficult to know which SQL syntax to use when ...
Well, if you happen to be using Sql Server you can do that sort of thing in T-Sql. In Oracle, you can also accomplish the same thing using pl/sql. Either way i'd do it in a stored ...
SQL Server 2008 introduces the ability to pass a table data type into stored procedures and functions. The table parameter feature can greatly ease the development process because you no longer need ...
A common SQL habit is to use SELECT * on a query, because it’s tedious to list all the columns you need. Plus, sometimes those columns may change over time, so why not just do things the easy way? But ...
Hi,<BR><BR>I'm in the process of building a SQL clean-up script that will be removing lots of now redundant data from our Oracle DB.<BR><BR>It seems that for tables which contain a FK pointing back to ...
I've said it before and I'll say it again: If you want to speed up your application, don't look at your code, look at your data access. The two slowest things you can do in application development are ...
A SQL Server expert gives his take on the absolute, No. 1, very worst thing IT pros can do when it comes to indexing. Consultant, author and Microsoft MVP Denny Cherry travels the world helping ...
SQL Server 2016 and Azure SQL Database both give you tables that automatically keep track of the history of your data. Here's how to retrieve that historical data. In an earlier column, I showed how ...
Inside a relational database management system, the principal persisted data structure is considered a logical relation. Operations performed against that data within the RDBMS result in a logical ...
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