vishali_vishu
asked on
clean up the table.
The table is populated the data and one of the field is Varchar and it represents some integer values.
so with in the sql query i need to compare the field value with an integer.
but unfortunately the data is bit currepted and the field has some #### in it and the sql is working fine if i delete those rows.
The other table has the same problem but it has hundrends of such rows.
how to delete the rows - whose column value is not capable of casting it to integer. ?
so with in the sql query i need to compare the field value with an integer.
but unfortunately the data is bit currepted and the field has some #### in it and the sql is working fine if i delete those rows.
The other table has the same problem but it has hundrends of such rows.
how to delete the rows - whose column value is not capable of casting it to integer. ?
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I propose the simpler way:
DELETE FROM MyTable WHERE ISNUMERIC(field) = 0
But be aware, it will also delete empty values and nulls.
DELETE FROM MyTable WHERE ISNUMERIC(field) = 0
But be aware, it will also delete empty values and nulls.
ISNUMERIC() is not an Oracle function.
Handle exception where you find that casting is errorring out.
Be sure to note down the exception number.
for e.g. the exception number is ORA-01700
here is pseudo code
BEGIN
SELECT * FROM table1
where col1 = CAST(col2 as integer)
EXCEPTION
WHEN OTHERS THEN
IF SQLCODE=-1700 THEN
DELETE FROM table1 WHERE primarykeycol = valueofprimarykey
END IF;
END;