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hello everyone and welcome back to the continuation of this chapter relational algebra in this video we will be learning about the binary relational algebra operations that is the join operation and the division operation first let us learn about the join operation which is denoted by this symbol now what does join operation do it combines tuples or rows from two relations into a single relation based on a given join condition you will understand this better with the help of examples this operation is very important when we have more than one relation and we want data from more than one relation this is the syntax of the join operation when we want to join two relations say relation r and relation s we write the first relation followed by the join operator and the join condition in the subscript followed by the second relation name let us see an example here ive taken a relation department with department name department number and manager ssn as its attributes ive also taken anothe