Difference between revisions of "SQL Syntax"

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There are several ways to specify columns:
There are several ways to specify columns:


:{ ''column_name''
:{ [DISTINCT] ''column_name''
:| [DISTINCT] ''column_name''
:| [DISTINCT](''column_name'')
:| [DISTINCT](''column_name'')
: ...
: ...
Line 32: Line 31:


where:
where:
:;DISTINCT:Eliminates duplicate rows from the result set.
:;DISTINCT:Eliminates duplicate values from the result set.

Revision as of 19:30, 11 November 2011

Here is the syntax for the SQL SELECT statements that the SQL parser recognizes.

Considerations
  • SQL syntax is case insensitive.
  • Field and table names are case sensitive

Learn more: SQL Functions

Legend
  • [ ... ] - Optional (one or none)
  • [ ... ]* - Zero or more
  • { ... | ... } - Choose one

SELECT STATEMENT

In a select statement, you designate one more columns, separated by commas (or "*" for all columns), a table to get the data from, and additional options:

SELECT
{ * | column_expr [, column_expr]* }
FROM table_reference
[WHERE where_clause]
[GROUP BY group_clause]
[ORDER BY order_clause]
[LIMIT limit_clause]

column_expr

There are several ways to specify columns:

{ [DISTINCT] column_name
| [DISTINCT](column_name)
...
}

where:

DISTINCT
Eliminates duplicate values from the result set.