mysql - What does SQL Select symbol || mean? - Stack Overflow so MySQL is the only RDBMS where '||' is equivalent to logical OR? Also treats as logical OR by default, because MariaDB is a fork of MySQL They have both changed enough since the fork that they should be considered different products, but they still share this behavior
sql - What is this operator lt;= gt; in MySQL? - Stack Overflow 21 <=> is MySQL's null-safe "equal to" operator From the manual: NULL-safe equal This operator performs an equality comparison like the = operator, but returns 1 rather than NULL if both operands are NULL, and 0 rather than NULL if one operand is NULL
Newest mysql Questions - Stack Overflow MySQL is an Open Source RDBMS (Relational Database Management System) that runs as a server providing multi-user access to several databases Sign up to watch this tag and see more personalized content
MySQL command line client for Windows - Stack Overflow Is there any nice command line MySQL client for windows? I mean a single exe that allows connecting and running a sample query I've googled and only could find big graphical environments like toad
How do you use the WITH clause in MySQL? - Stack Overflow 191 MySQL prior to version 8 0 doesn't support the WITH clause (CTE in SQL Server parlance; Subquery Factoring in Oracle), so you are left with using: TEMPORARY tables DERIVED tables inline views (effectively what the WITH clause represents - they are interchangeable) The request for the feature dates back to 2006
How can I do insert if not exists in MySQL? - Stack Overflow I started by googling and found the article How to write INSERT if NOT EXISTS queries in standard SQL which talks about mutex tables I have a table with ~14 million records If I want to add more