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Using ROWNUM To Retrieve

Using ROWNUM To Retrieve

It is often necessary to get a list of values from multiple rows. Generally, this is done using the cursor, which tends to make the task more complicated.

I tried to use ROWNUM pseudocolumn as:

  SELECT GEN_CODE  INTO :temp[i]	FROM  GEN_TABLE	WHERE  ROWNUM = i;


It works only for i=1!, because selecting only one row defaulted ROWNUM = 1 !. In order to select one row at a time, use nested select as shown here:

 i=0DO  i =i+1  SELECT GEN_CODE  INTO :temp[i]FROM   (SELECT GEN_CODE, ROWNUM rn	FROM   GEN_TABLE)	  WHERE rn =:i;LOOP UNTIL SQLCA.SQLCode = 100


Note: It is important to use aliase rn, because ROWNUM is getsoverriden by the outer select.

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