How to Reindex SQL Tables. The indexes on a the tables of a large database make a huge difference in its performance and utility. Without an index, ...

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 ...

Replace "new_table" with the name of the table to create, and replace "old_table" with the name of the table to select from. The INTO clause behaves the same as CREATE TABLE in other SQL environments.

An inner join returns a result table for all the rows in a table that have one or more matching rows in the other table(s), as specified by the sql-expression. Inner joins can be performed on up to 32 ...

SQL is the leading language for developing and querying databases, but it has a few quirks.In my last article, I shared 7 SQL mistakes to avoid.Now, let’s take a look at 9 best practices for ...

Complex SQL query with optional tables. Thread starter Hadesdarklord; Start date May 12, 2015; ... The 3 that have optional link information (an entry in the video_links table).

Once defined, SQL Server will automatically keep up with the rest. Note that there are several special rules about using temporal tables. For example, you may not create INSTEAD OF triggers on a ...

SQL lets you use one command to quickly create a new table containing a subset of records from a larger table while working in Access. Sound complicated? It's not, as Mary Ann Richardson shows us.

The DICTIONARY tables component is specified in the FROM clause of a SELECT statement. DICTIONARY is a reserved libref for use only in PROC SQL. Data from DICTIONARY tables are generated at run time.