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 ...

Click New Query in the context menu. In the Query window, type a statement such as the following: SELECT client_id, first_name, last_name INTO new_table FROM old_table; GO ...

FROM table1, table2 WHERE table1.keyfield=table2.keyfield When you execute a statement like this, SQL creates a new table—the results recordset—based on the contents of table1 and table2.

The left join updates all rows in table A. Inner join only updates rows in table A where there is a matching ID in table B. You're working with different row sets. Now if you said something like: ...

SQL Server 2016 lets you treat JSON objects like rows in a table, allowing you to use data from AJAX queries in joins, updates and any other SQL statement you can think of. SQL Server 2016 provides ...