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 ...

If your business uses relational databases to store data, it helps to use the SQL SELECT command with the INTO clause to create new tables from query results. This method isn't ANSI-standard SQL ...

SQL JOINs make it easy to find and fix missing ... tools for finding and fixing orphaned records (or other dirty data) in your tables.

A common SQL habit is to use SELECT * on a query ... For instance, if you insert data into a table and then use UPDATE to change it, like I’ve just shown, that’s two separate transactions.

and scripts the post-processing for each table. I used several coding techniques in the DAL that I would like to point out. For an object that was returning the result of a SQL query, if I needed a ...

However, the ANSI SQL 2011 update to the standards specified that relational databases should also support the ability to query the table from the point of view of any point in time. In a regular ...

Analyze database contents using basic, intermediate and advanced SQL statement syntax and usage. Demonstrate capability to query data from multiple tables using SQL JOINS. Create and modify database ...

A few years ago, teams had to write SQL queries and code ... the relevant movie-associated data, execute the query with filters and an LM to come up with a table of classic romance movies sorted ...

For instance, a certain column in a table may be restricted to integers only. As a result, the data recorded in the column will have a high degree of normalization. The rigid schema of a SQL ...