Structured Query Language or SQL, is a ............... that allows a high-level expression of queries.

...............is a useful theoretical language that serves to define more complex languages.

Queries in relational algebra are performed using operators

Relational algebra is divided into similar groups

The sequence of operations in a relation algebra is called relational algebra expression.

SELECT (σ)

JOIN

Binary Relational Operations : RENAME (ρ)

CARTESIAN PRODUCT ( x )

The relation resulting from the SELECT operation has the ........ attributes as R.

The symbol σ (sigma) is used to denote the project operator

The SELECT operator is unary; that is, it is applied to a single relation.

The number of tuples in the resulting relation is always............. to the number of tuples in R

a sequence of SELECTs can be applied in any order

The ............... operation, selects certain columns from the table and discards the other
columns.

the result of the PROJECT operation can be visualized as a vertical partition of the relation into two relations

The general form of the PROJECT operation is

The result of the PROJECT operation has only the attributes specified in <attribute list> in the same orde they appear in the list.

PROJECT degree ........... the number of attributes in < attribute list >.