You can write regular SQL Server queries here, for example:

SELECT * FROM "Users" u WHERE u.name LIKE '%John%'

Passing parameters to the query

You can add params to your query by naming them $variable. When you use this query in the frontend, you can dinamically fill the parameters:

SELECT * FROM "Users" u WHERE u.name = $variable_name

Insert example:

INSERT INTO "Users"(name, email) VALUES ($name,$email)

Update example:

UPDATE "Users" SET name = $name WHERE u.email = $email

Delete example:

DELETE FROM "Users" WHERE u.email = $email