SQL Syntax
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Revision as of 20:03, 11 November 2011 by imported>Aeric (→column_expr)
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
- [ DISTINCT ]
- { * | column_expr [, column_expr]* }
- FROM table_reference
- [WHERE where_clause]
- [GROUP BY group_clause]
- [ORDER BY order_clause]
- [LIMIT limit_clause]
where:
- DISTINCT
- Eliminates duplicate rows from the result set.
- Note:
- For example: DISTINCT(customer_name,address)
Learn more:: MySQL Select Statement syntax
column_expr
There are several ways to specify columns:
- { column_name | SQL Function }
- [ [AS] alias]
where:
- alias
- Displayed as the column name in the result set, in the SQL Browser. Can also be used as a field name in a group_expr or order_expr.
- For example:
- <syntaxhighlight lang="sql" enclose="div">
SELECT CONCAT(last_name,', ',first_name) AS full_name
FROM Customer_Contacts ORDER BY full_name;
</syntaxhighlight>