# Left right join sas

##### *2020-02-29 06:53*

The three types of outer joins are left, right, and full. A left outer join, specified with the keywords LEFT JOIN and ON, has all the rows from the Cartesian product of the two tables for which the sqlexpression is true, plus rows from the first (LEFTTAB) table that do not match any row in the second (RIGHTTABPROCLIB. PAYROLL is listed first and is considered the left table. PROCLIB. PAYROLL2 is the right table. from proclib. payroll as p left join proclib. payroll2 as p2. Specify the join criterion. The ON clause specifies that the join be performed based on the values of the ID numbers from each table. left right join sas

The Right Join A right join is where all the observations are selected from the second data set and where observations do not match in the first data set the key values themselves are assigned missing values. A right join, like a left join, is not commutative neither is a right join the same as reversing the order of the two data sets in a left join.