Updating a record through cursor

In addition, PL/SQL conforms to the current ANSI/ISO SQL standard.statements might credit one bank account and debit another.just delete the – juergen d Jul 3 '12 at OK, now there's nothing to distinguish the NULL records, so you can't tell it which row to update. – Sean Jul 3 '12 at Do you simply want the record updated in the order they are with the last non null row when all fields are null?– Vincenzo Maggio Jul 3 '12 at Welcome to Stack Overflow: if you post code, XML or data samples, please highlight those lines in the text editor and click on the "code samples" button ( 相关推荐:c# - Inserting Multiple Records into SQL Server database using for loophe SQL Server database from an array.

While we won't be looking at the use of multiple cursors within the same stored proc, it is entirely possible to have multiple cursors in the same code block, but each cursor must have a unique name. HANDLER statement specifies a handler that deals with one or more conditions.A handler_action constant may be used to indicate what action the handler takes after execution of the handler statement.First Name Last Name Emp Number Effective From Effective To Job Title john A EMP01 2004-05-01 2005-09-01 credit officer NULL NULL NULL 2005-09-01 2006-30-01 chief credit officer NULL NULL NULL 2006-30-01 2006-30-09 george B EMP02 david C EMP03 NULL NULL NULL NULL NULL NULL sql sql-server | this question edited Jul 3 '12 at asked Jul 3 '12 at xurca 1,963 2 14 21 2 What are your column names?If your program fails in the middle of a transaction, Oracle detects the error and rolls back the transaction, restoring the database to its former state.You use the CREATE TABLE employees_temp AS SELECT employee_id, first_name FROM employees; CREATE TABLE employees_temp2 AS SELECT employee_id, first_name FROM employees; DECLARE next_value NUMBER; BEGIN -- The NEXTVAL value is the same no matter what table you select from. NEXTVAL INTO next_value FROM dual; -- You usually use NEXTVAL to create unique numbers when inserting data. NEXTVAL, 'value 1'); -- If you need to store the same value somewhere else, you use CURRVAL. CURRVAL, 'value 1'); -- Because NEXTVAL values might be referenced by different users and -- applications, and some NEXTVAL values might not be stored in the -- database, there might be gaps in the sequence.

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A cursor is a special kind of loop for traversing through an SQL resultset one row at a time.

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