Updating deleting predicates oracle
(Where expression is any column name of Table) COUNT (*): Returns number of rows in a table including duplicates rows and rows containing null values in any of the columns. A sub query is a SELECT statement that is embedded in a clause of another SELECT statement. For ex: Select empno, ename, &&column_name from employee order by &column_name; Q. To avoid a Cartesian product, always include a valid join condition in a “where” clause.
The top space usage in a table is known as the high water mark.Tom Kyte has a really good (unsurprisingly) post about it.Last Updated: If you're looking for Oracle PL SQL Interview Questions for Experienced or Freshers, you are at right place.For ex: Select TO_CHAR (hiredate, ‘MM/YY’) from employee.TO_DATE function is used to convert Character string to date format.