sql – Helen Anderson

Conditional logic with the CASE expression

Mon, 19 Aug 2019 05:11:04 +0000

CASE is SQL's answer to other programming languages IF-ELSE statement. If you need to test a condition and return a value CASE is the expression you need.

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Why you need SQL Window Functions (part 2)

Sun, 21 Jul 2019 07:52:18 +0000

SQL Server Window Functions are incredibly powerful and allow us to access a total from another row and bucket data to show top performers.

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Why you need SQL Window Functions (part 1)

Mon, 15 Jul 2019 07:31:56 +0000

SQL window functions are incredibly powerful and allow us to see the rows in a table with a new column showing a running total, rank or moving average.

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SQL Aggregate Functions and Mariah Carey

Mon, 17 Jun 2019 03:48:02 +0000

Aggregate functions bring your data to life.
They allow you to take a standard table and use a function or two to build metrics and answer questions about the data.

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Search with system tables

Sun, 28 Apr 2019 14:11:46 +0000

Your database doesn’t just contain your data. It also contains data about your data.

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Have you VACUUMed your tables lately?

Sun, 24 Mar 2019 08:33:09 +0000

A high-level overview of why your DBA needs to VACUUM your tables

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