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Preventing the return of NULL values in Oracle, SQL Server and MySQL queries

Sometimes, when writing a query, you don’t want to return a NULL value. This is particularly important during concatenation where the presence of a NULL in one or more of the fields to be joined may...

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3 useful MySQL queries

I regularly have to create database update scripts i.e. scripts that create tables or add new columns to existing tables or populate new tables with base data. One requirement is that these scripts be...

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3 useful Oracle queries

Yesterday I posted 3 useful MySQL queries that I use almost every day. As I also work with Oracle I have to use the equivalents for that database i.e. I regularly have to create database update scripts...

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