The INFORMATION_SCHEMA database is full of information and metadata about your database(s). Columns are a necessity and their definition ensures sound storage and data integrity. Learn all about them with the COLUMNS table.
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MySQL Metadata Queries – Find all tables in a Schema
Of course, there are other ways to determine what tables are present in a particular MySQL Database or Schema. You can also find this information if your database user account has permissions for the INFORMATION_SCHEMA database. Continue reading and follow along with an example query…
(more…)Filter Data in the MySQL WHERE Clause With Less Than and Greater Than Comparisons
While equality and inequality filter conditions are very common, many times you wish to filter the FROM clause table rows based on values that are less than or greater than another value. MySQL (and SQL in general) supports the less than (<) and greater than (>) operators. Continue reading and see examples of each…
(more…)MySQL WHERE Clause Inequality Comparison Operators
Just as you want to filter the rows of data returned in a SELECT query with the equality comparison operator (=), you can also create a conditional filter to test if 2 values are not equal to one another. Learn more in the following article.
(more…)Find All Table’s Current AUTO_INCREMENT Value
I recently wanted to check all tables’ current AUTO_INCREMENT value (if any) for a database dump structure. I wasn’t sure if a tables’ Data Definition Language (DDL) statement contained the current AUTO_INCREMENT value or not. So after I loaded the dump file, I learned of a query to use and find out…
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