persistent-sql-lifted-0.4.3.1: Monad classes for running queries with Persistent and Esqueleto

Safe Haskell	Safe-Inferred
Language	GHC2021

Database.Persist.Sql.Lifted.Expression.Count

Synopsis

count :: Num a => SqlExpr (Value typ) -> SqlExpr (Value a)
countRows :: Num a => SqlExpr (Value a)
countDistinct :: Num a => SqlExpr (Value typ) -> SqlExpr (Value a)

Documentation

count :: Num a => SqlExpr (Value typ) -> SqlExpr (Value a) #

COUNT.

countRows :: Num a => SqlExpr (Value a) #

COUNT(*) value.

countDistinct :: Num a => SqlExpr (Value typ) -> SqlExpr (Value a) #

COUNT(DISTINCT x).

Since: esqueleto-2.4.1