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 Microsoft Dynamics CRM adapter:

SELECT {
  [ TOP <numeric_literal> | DISTINCT ]
  { 
    * 
    | { 
        <expression> [ [ AS ] <column_reference> ] 
        | { <table_name> | <correlation_name> } .* 
      } [ , ... ] 
  }
  { 
    FROM <table_reference> [ [ AS ] <identifier> ] 
  } [ , ... ]
  [ [ 
      INNER | { { LEFT | RIGHT | FULL  } [ OUTER ] }  
    ] 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> { = | != | <> | < | > | <= | >= | IS NULL | IS NOT NULL | CONTAINS | LIKE | NOT LIKE | IN | NOT IN | AND | OR } [ <expression> ]
    } [ { AND | OR } ... ]

Examples

Return all columns:
```
SELECT * FROM Lead
```

Rename a column:

SELECT "FirstName" AS MY_FirstName FROM Lead

Cast a column's data as a different data type:

SELECT CAST(Revenue AS VARCHAR) AS Str_Revenue FROM Lead

Search data:

SELECT * FROM Lead WHERE FirstName <> 'Bob'

The Microsoft Dynamics CRM APIs support the following operators in the WHERE clause: =, !=, <>, <, >, <=, >=, IS NULL, IS NOT NULL, CONTAINS, LIKE, NOT LIKE, IN, NOT IN, AND, OR.
```
SELECT * FROM Lead WHERE FirstName <> 'Bob';
```
Return the number of items matching the query criteria:
```
SELECT COUNT(*) AS MyCount FROM Lead 
```
Return the number of unique items matching the query criteria:
```
SELECT COUNT(DISTINCT FirstName) FROM Lead 
```
Return the unique items matching the query criteria:
```
SELECT DISTINCT FirstName FROM Lead 
```

Sort a result set in ascending order:

SELECT Id, FirstName FROM Lead  ORDER BY FirstName 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