Frequent question: How do I iterate through a result set in SQL Server?

How do you iterate through a result set?

To iterate the ResultSet you use its next() method. The next() method returns true if the ResultSet has a next record, and moves the ResultSet to point to the next record. If there were no more records, next() returns false, and you can no longer.

How do you iterate in SQL query?


  2. GO.
  4. — Declare your array table variable.
  5. DECLARE @MYARRAY table (TEMPCOL nvarchar(50), ARRAYINDEX int identity(1,1) )

How do I iterate through a cursor in SQL?

The cursor FOR LOOP implicitly creates its loop index as a record variable with the row type in which the cursor returns and then opens the cursor. In each loop iteration, the cursor FOR LOOP statement fetches a row from the result set into its loop index.

Is there a FOR LOOP in SQL?

In SQL Server, there is no FOR LOOP. However, you simulate the FOR LOOP using the WHILE LOOP.

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How do you find the value of the ResultSet?

The ResultSet interface declares getter methods (for example, getBoolean and getLong ) for retrieving column values from the current row. You can retrieve values using either the index number of the column or the alias or name of the column. The column index is usually more efficient. Columns are numbered from 1.

How can I get ResultSet size?

Simply iterate on ResultSet object and increment rowCount to obtain size of ResultSet object in java. rowCount = rs. getRow();

How can we iterate through database?

</td></tr>“; } echo “</table>”; The while loop will loop through the results and assign a row to $row, until you run out of rows. Plus no need to deal with getting the count of results at that point. This is the “usual” way to loop through results from a DB in php.

How do I create a list in SQL?

You can create lists of SQL Query or Fixed Data values . In the Data Model components pane, click List of Values and then click Create new List of Values. Enter a Name for the list and select a Type.

Why cursors are used in SQL?

In SQL procedures, a cursor make it possible to define a result set (a set of data rows) and perform complex logic on a row by row basis. By using the same mechanics, an SQL procedure can also define a result set and return it directly to the caller of the SQL procedure or to a client application.

What is difference between stored procedure and function?

The function must return a value but in Stored Procedure it is optional. Even a procedure can return zero or n values. Functions can have only input parameters for it whereas Procedures can have input or output parameters. Functions can be called from Procedure whereas Procedures cannot be called from a Function.

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What are triggers in SQL?

A SQL trigger is a database object which fires when an event occurs in a database. We can execute a SQL query that will “do something” in a database when a change occurs on a database table such as a record is inserted or updated or deleted. For example, a trigger can be set on a record insert in a database table.

How do I run a SQL query in a for loop?

Running a Query Inside the Loop

  1. WHILE @Counter <= @MaxOscars.
  2. BEGIN.
  3. SET @NumFilms =
  5. FROM tblFilm.
  6. WHERE FilmOscarWins = @Counter.
  7. SET @Counter += 1.
  8. END.

What is a nested loop give an example?

A nested loop is a (inner) loop that appears in the loop body of another (outer) loop. The inner or outer loop can be any type: while, do while, or for. For example, the inner loop can be a while loop while an outer loop can be a for loop.

How do I stop an infinite loop in SQL Server?

In SQL Server, the BREAK statement is used when you want to exit from a WHILE LOOP and execute the next statements after the loop’s END statement.

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