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Should I use a view or a stored procedure?
Views should be used to store commonly-used JOIN queries and specific columns to build virtual tables of an exact set of data we want to see. Stored procedures hold the more complex logic, such as INSERT, DELETE, and UPDATE statements to automate large SQL workflows.
What is the difference between a view and a cursor?
View is a database object similar to table so it can be used with both SQL and PL/SQL. Cursor is defined and used within the block of stored procedure which means it can be only used with PL/SQL.
How to use stored procedure inside the cursor in SQL?
Their is a table called “Organization” in which the details regarding each employee is saved. Now what is want is to CREATE a CURSOR which will fetch a single row from Organization table and execute the stored procedure SP1, which will generate a unique key and that key should be used in the ID column of the next table as shown below
When to return data from a stored procedure?
When returned, the cursor position is set before the first row. For a forward-only cursor, if the cursor is positioned beyond the end of the last row when the procedure exits, an empty result set is returned to the calling batch, procedure, or trigger. Note. An empty result set is not the same as a null value.
When does a scrollable cursor return to the calling batch?
For a scrollable cursor, all the rows in the result set are returned to the calling batch, procedure, or trigger when the procedure exits. When returned, the cursor position is left at the position of the last fetch executed in the procedure.
What happens when a cursor is closed in SQL?
For any type of cursor, if the cursor is closed, then a null value is passed back to the calling batch, procedure, or trigger. This will also be the case if a cursor is assigned to a parameter, but that cursor is never opened. The closed state matters only at return time.