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By extending SQL, PL/SQL offers a unique combination of power and ease of use.
You might use sequence numbers to give each row a unique identifier, and refer to those identifiers from other rows to set up parent-child relationships. PL/SQL declares a cursor implicitly for all SQL data manipulation statements, including queries that return only one row.Cursors and variables follow the same scoping rules.Naming cursors after database tables is possible but not recommended.After creating a sequence, you can use it to generate unique sequence numbers for transaction processing. PUT_LINE ('Initial sequence value: '
%FOUND Attribute: Has a DML Statement Changed Rows?