sql operatorsthe plsql uses all the sql set
SQL Operators
The PL/SQL uses all the SQL set, comparison, and row operators in the SQL statements. This part briefly describes some of these operators.
1. Comparison Operators
2. Set Operators
3. Row Operators
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currval and nextvalthe series is a schema object which generates the sequential numbers whenever you form a sequence you can specify its primary
levelyou use the level with the select connect by statement to categorize rows from a database table into a tree structure the level returns the
rowidthe rowid returns the rowid binary address of a row in the database table you can use the variables of the type urowid to store rowids in a
rownumthe rownum returns a number representing the order in which a row was selected from the table the first row selected has a rownum of 1 the
sql operatorsthe plsql uses all the sql set comparison and row operators in the sql statements this part briefly describes some of these
set operatorsthe set operators combine the results of the two queries into one result the intersect returns all the distinct rows selected by both
row operatorsthe row operators return or reference the particular rows all retains the duplicate rows in the result of a query or in an aggregate
managing cursorsthe plsql uses 2 types of cursors implicit and explicit the plsql declares a cursor implicitly for all the sql data manipulation
explicit cursorsthe set of rows returned by the query can include zero one or multiple rows depending on how many rows meet your search criteria
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