what is the difference between the query and corelated
query
Answer Posted / aravinda
query: query is single time validation of conditions for
entire result once result is fetched there no further
validation of records.
corelated sub query : each record is validated with inner
query aftr fetch.
1) outer query will execute first and pass a value to inner
query.
2) based on outer query value inner query will execute.
3) based on inner query value the outer query record will be
validated.
inner query will execute for every record of outer query( if
outer query has 10 records inner query will execute 10 times)
Is This Answer Correct ? | 6 Yes | 0 No |
Post New Answer View All Answers
What is dml statement?
what is rollback? : Sql dba
Does varchar need length?
how to use in conditions? : Sql dba
Can we use pl sql in mysql?
Can you sum a count in sql?
What are tables and fields?
What is the command used to fetch first 5 characters of the string?
Does mysql support pl sql?
What is pivot table in sql?
What is sql injection owasp?
what are properties of a transaction? : Sql dba
how do you login to mysql using unix shell? : Sql dba
what is unique key constraint? : Sql dba
What is sql engine in oracle?