SELECT Statements
A SELECT statement can consist of the following basic clauses.
- SELECT
- INTO
- FROM
- JOIN
- WHERE
- GROUP BY
- HAVING
- UNION
- ORDER BY
- LIMIT
SELECT Syntax
The following syntax diagram outlines the syntax supported by the GitHub Data API adapter:
SELECT {
[ TOP <numeric_literal> | DISTINCT ]
{
*
| {
<expression> [ [ AS ] <column_reference> ]
| { <table_name> | <correlation_name> } .*
} [ , ... ]
}
[ INTO csv:// [ filename= ] <file_path> [ ;delimiter=tab ] ]
{
FROM <table_reference> [ [ AS ] <identifier> ]
} [ , ... ]
[
JOIN <table_reference> [ ON <search_condition> ] [ [ AS ] <identifier> ]
] [ ... ]
[ WHERE <search_condition> ]
[ GROUP BY <column_reference> [ , ... ]
[ HAVING <search_condition> ]
[ UNION [ ALL ] <select_statement> ]
[
ORDER BY
<column_reference> [ ASC | DESC ] [ NULLS FIRST | NULLS LAST ]
]
[
LIMIT <expression>
[
{ OFFSET | , }
<expression>
]
]
}
<expression> ::=
| <column_reference>
| @ <parameter>
| ?
| COUNT( * | { [ DISTINCT ] <expression> } )
| { AVG | MAX | MIN | SUM | COUNT } ( <expression> )
| NULLIF ( <expression> , <expression> )
| COALESCE ( <expression> , ... )
| CASE <expression>
WHEN { <expression> | <search_condition> } THEN { <expression> | NULL } [ ... ]
[ ELSE { <expression> | NULL } ]
END
| <literal>
| <sql_function>
<search_condition> ::=
{
<expression> { = | AND | < | > | <= | >= | <> | != } [ <expression> ]
} [ { AND | OR } ... ]
Examples
- Return all columns:
SELECT * FROM Repositories
- Rename a column:
SELECT "OwnerLogin" AS MY_OwnerLogin FROM Repositories
- Cast a column's data as a different data type:
SELECT CAST(Size AS VARCHAR) AS Str_Size FROM Repositories
- Search data:
SELECT * FROM Repositories WHERE OwnerLogin = 'mojombo'
- The GitHub Data API APIs support the following operators in the WHERE clause: =, AND, <, >, <=, >=, <>, !=.
SELECT * FROM Repositories WHERE OwnerLogin = 'mojombo';
- Return the number of items matching the query criteria:
SELECT COUNT(*) AS MyCount FROM Repositories
- Return the number of unique items matching the query criteria:
SELECT COUNT(DISTINCT OwnerLogin) FROM Repositories
- Return the unique items matching the query criteria:
SELECT DISTINCT OwnerLogin FROM Repositories
- Sort a result set in ascending order:
SELECT Name, OwnerLogin FROM Repositories ORDER BY OwnerLogin ASC
Aggregate Functions
For SELECT examples using aggregate functions, see Aggregate Functions.
JOIN Queries
See JOIN Queries for SELECT query examples using JOINs.
Date Literal Functions
Date Literal Functions contains SELECT examples with date literal functions.
Window Functions
See Window Functions for SELECT examples containing window functions.
Table-Valued Functions
See Table-Valued Functions for SELECT examples with table-valued functions.