JOIN Queries
The CData ODBC Driver for Elasticsearch supports standard SQL joins like the following examples.
Inner Join
An inner join selects only rows from both tables that match the join condition:
SELECT Customer.FirstName, Customer.LastName, Purchases.ItemName FROM Purchases INNER JOIN Customer ON Purchases.CustomerId = Customer.Id
Left Join
A left join selects all rows in the FROM table and only matching rows in the JOIN table:
SELECT Customer.FirstName, Customer.LastName, Purchases.ItemName FROM Purchases LEFT JOIN Customer ON Purchases.CustomerId = Customer.Id