⟩ Explain Relational Algebra?
It is procedural query language. It consists of a set of operations that take one or two relations as input and produce a new relation.
It is procedural query language. It consists of a set of operations that take one or two relations as input and produce a new relation.
TRUNCATE TABLE EMP; DELETE FROM EMP; Will the outputs of the above two commands differ?
What is a join? Explain the different types of sql joins?
What is SQL injection?
What are the data types allowed in a table?
What is the usage of SAVEPOINTS?
What is an integrity constraint?
Where the integrity constraints are stored in data dictionary?
How many LONG columns are allowed in a table? Is it possible to use LONG columns in WHERE clause or ORDER BY?
Difference between SUBSTR and INSTR?
What is CYCLE/NO CYCLE in a Sequence?