Read this SQL tutorial to learn when to use SELECT ... A simple SELECT statement is the most basic way to query multiple tables. You can call more than one table in the statement’s FROM clause ...

With SQL Server 2016, it now makes sense to store JSON objects in your database (even though there’s no JSON datatype). Here’s how to query ... return a value (if, in this example, there is no ...

For example, neither one of these queries ... value and return a row. select ‘true’ from dual where 1 is null; select ‘true’ from dual where null is null; When you use IN, you’re telling ...