Avatto>>DATA SCIENTIST>>SHORT QUESTIONS>>SQL Tricky Interview Questions
SELECT * FROM Employee INTERSECT SELECT * FROM Employee1
The OFFSET argument is used to identify the starting point to return rows from a result set. Basically, it excludes the first set of records.
OFFSET can only be used with the ORDER BY clause. It cannot be used on its own. OFFSET value must be greater than or equal to zero. It cannot be negative, else return an error. SELECT column_name(s)
FROM table_name
WHERE condition
ORDER BY column_name
OFFSET rows_to_skip ROWS;
DROP is a Data Definition Language (DDL) command which removes the named elements of the schema like relations, domains or constraints and you can also remove an entire schema using the DROP command.
DROP SCHEMA schema_name RESTRICT;
DROP Table table_name CASCADE;
DELETE is a Data Manipulation Language (DDL) command and used when you want to remove some or all the tuples from a relation. If WHERE clause is used along with the DELETE command it removes only those tuples which satisfy the WHERE clause condition but if WHERE clause is missing from the DELETE statement then by default all the tuples present in relation are removed.
DELETE FROM relation_name
WHERE condition;
There were some output related questions where a table was given, mostly on the group by, order by, top, etc. command


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