Question
Which of the following is NOT a valid relational algebra
operation?                           ÂSolution
Relational algebra is a theoretical language used for querying and manipulating relations (tables) in a relational database. The key operations in relational algebra are:
- UNION : Combines the results of two queries and returns distinct rows present in either relation.
- INTERSECT : Returns the rows that are present in both relations.
- DIFFERENCE : Returns rows from the first relation that are not in the second relation.
- SELECT : A unary operation that retrieves a subset of rows from a relation based on a condition.
- A, B, C, and E are all valid relational algebra operations, as they represent basic operations to manipulate and retrieve data from relations.
Fill in the blank/s with suitable Word/s:
The researchers plan to _________ their findings and _________ a report for publication.
Fill the blank with the most appropriate word.
The principal wanted to meet me _____________theft in the school .
Fill blank number 29 with correct option:
I opened the bag and packed the boots in; and then, just as I was ______ to close it, a horrible idea ________ to me.
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The outcome of the meeting was beyond what we expected as it _______________positive result in the form of an assurance that the ______________proposals...
Select the most appropriate option to fill in the blank.
The government should take steps to ______ pollution.
They were ________________ by nature with a strong work ethic and a firm belief in self-sufficiency.
Despite the uninspiring weather, the city was ……….. with a youthful ………..
