Having (SQL)
Encyclopedia
A
specifies that an SQL
s. It was added to the SQL language because the
Referring to the sample tables in the Join (SQL)
example, the following query will return the list of departments who have more than 1 employee:
HAVING
clause in SQLSQL
SQL is a programming language designed for managing data in relational database management systems ....
specifies that an SQL
SELECTSelect (SQL)The SQL SELECT statement returns a result set of records from one or more tables.A SELECT statement retrieves zero or more rows from one or more database tables or database views. In most applications, SELECT is the most commonly used Data Manipulation Language command...
statement should only return rows where aggregate values meet the specified conditionCondition (SQL)
A relational database management system uses SQL conditions or expressions in WHERE clauses and in HAVING clauses to SELECT subsets of data.- Types of condition :...
s. It was added to the SQL language because the
WHEREWhere (SQL)A WHERE clause in SQL specifies that a SQL Data Manipulation Language statement should only affect rows that meet specified criteria. The criteria are expressed in the form of predicates...
keyword could not be used with aggregate functions.Examples
To return a list of department IDs whose total sales exceeded $1000 on the date of January 1, 2000, along with the sum of their sales on that date:Referring to the sample tables in the Join (SQL)
Join (SQL)
An SQL join clause combines records from two or more tables in a database. It creates a set that can be saved as a table or used as is. A JOIN is a means for combining fields from two tables by using values common to each. ANSI standard SQL specifies four types of JOINs: INNER, OUTER, LEFT, and RIGHT...
example, the following query will return the list of departments who have more than 1 employee: