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Use cases where we need to have the result with varying are possible.

You can change the value in the resulting field using the function.

Consider the following:

Case 1: 2 decimal places

SELECT TRUNCATE(122.16464,2) AS VALUE;
where 122.16464 is the value and the 2 is the number of desired decimal places. 

+--------+
| VALUE  |
+--------+
| 122.16 |
+--------+

Case 2: 1 decimal place

SELECT TRUNCATE(122.16464,1) AS VALUE;
where 122.16464 is the value and the 1 is the number of desired decimal places. 

+--------+
| VALUE  |
+--------+
| 122.1  |
+--------+

Case 3: 0 decimal place

SELECT TRUNCATE(122.16464,0) AS VALUE;
where 122.16464 is the value and the 0 is the number of desired decimal places. 

+--------+
| VALUE  |
+--------+
|    122 |
+--------+ 

 

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