Asked by: Abdellah Dercksentechnology and computing databases
What is where clause in Oracle?
Last Updated: 26th April, 2020
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Furthermore, what is where clause in SQL?
A WHERE clause in SQL specifies that a SQL Data Manipulation Language (DML) statement should only affect rows that meet specified criteria. In brief SQL WHERE clause is used to extract only those results from a SQL statement, such as: SELECT, INSERT, UPDATE, or DELETE statement.
Beside above, can case be used in where clause in Oracle? Oracle CASE expression allows you to add if-else logic to SQL statements without having to call a procedure. For example, you can use the CASE expression in statements such as SELECT , UPDATE , or DELETE , and in clauses like SELECT , WHERE , HAVING , and ORDDER BY .
Similarly, what is a clause in Oracle?
In Oracle, HAVING Clause is used with GROUP BY Clause to restrict the groups of returned rows where condition is TRUE.
What does a (+) sign mean in an Oracle SQL where clause?
Oracle outer join operator (+) allows you to perform outer joins on two or more tables. Quick Example: -- Select all rows from cities table even if there is no matching row in counties table SELECT cities.