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 LinkedIn 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>
]
]
} | SCOPE_IDENTITY()
<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 CompanyStatusUpdates
- Rename a column:
SELECT "Comment" AS MY_Comment FROM CompanyStatusUpdates
- Cast a column's data as a different data type:
SELECT CAST(Size AS VARCHAR) AS Str_Size FROM CompanyStatusUpdates
- Search data:
SELECT * FROM CompanyStatusUpdates WHERE EntityId = '238'
- The LinkedIn APIs support the following operators in the WHERE clause: =, >, <, >=, <=, AND.
SELECT * FROM CompanyStatusUpdates WHERE EntityId = '238';
- Return the number of items matching the query criteria:
SELECT COUNT(*) AS MyCount FROM CompanyStatusUpdates
- Return the number of unique items matching the query criteria:
SELECT COUNT(DISTINCT Comment) FROM CompanyStatusUpdates
- Return the unique items matching the query criteria:
SELECT DISTINCT Comment FROM CompanyStatusUpdates
- Sort a result set in ascending order:
SELECT VisibilityCode, Comment FROM CompanyStatusUpdates ORDER BY Comment 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.