SQL Having Clause

SQL having clause is a DML (data manipulation language) command used in conjunction with the Group By clause to restrict the records retrieved based on a criteria applied to the aggregate function result values defined in the query.

The basic syntax of the SQL Having clause is:

SQL Having somecriteria

The SQL having clause is optional and is entered as the last clause of a query, after the group by clause.

Select TableName.FieldName1, Count(TableName.Field2),Avg(TableName.Field3) From TableName Where yourcriteria Group By TableName.FieldName1 Having somecriteria

Note: The ending semicolon is a required component of all SQL statements.

Now an SQL Having example with real column and table names:

Select Emp_Name, Sum(iif(Daily_Absence=true,1,0)), Avg(Daily_Hours) From M_Employees Where Work_Date>=#01/01/06# and Work_Date<=#03/31/06# Group By Emp_Name Having Sum(iif(Daily_Absence=true,1,0))>3;

The above query will retrieve unique employees having daily absences days totaling more than 3 during the 1st quarter of 2006 and displays the average daily work hours during the 1st Q.

More Access Having Clause Examples:

Access Having Function with Group By

FieldName1 Having some criteria. Note: The ending semicolon is a required component of all SQL ... Emp_Name Having Sum(iif(Daily_Absence=true,1,0))>3; ...

Access Having Clause: Update Master Records Based on Detail Record Fields

Having Max(Action_Items.Action_Completed)=-1 " & _ " Group By Task_ID)"). Else. DoCmd.RunSql ("Update Tasks set Task_Complete=False " & _ ...