MySQL में रिकॉर्ड NULL होने पर नए कॉलम में 0 लौटाना

इसके लिए CASE स्टेटमेंट का उपयोग कर सकते हैं।

उदाहरण

टेबल बनाएं:

mysql> create table DemoTable703 (Price int);
Query OK, 0 rows affected (0.46 sec)

रिकॉर्ड डालें:

mysql> insert into DemoTable703 values(102);
Query OK, 1 row affected (0.27 sec)
mysql> insert into DemoTable703 values(NULL);
Query OK, 1 row affected (0.13 sec)
mysql> insert into DemoTable703 values(0);
Query OK, 1 row affected (0.13 sec)
mysql> insert into DemoTable703 values(500);
Query OK, 1 row affected (0.11 sec)
mysql> insert into DemoTable703 values(100);
Query OK, 1 row affected (0.14 sec)
mysql> insert into DemoTable703 values(NULL);
Query OK, 1 row affected (0.12 sec)
mysql> insert into DemoTable703 values(2340);
Query OK, 1 row affected (0.14 sec)

सभी रिकॉर्ड देखें:

mysql> select * from DemoTable703;

आउटपुट

+-------+
| Price |
+-------+
| 102   |
| NULL  |
| 0     |
| 500   |
| 100   |
| NULL  |
| 2340  |
+-------+
7 rows in set (0.00 sec)

CASE स्टेटमेंट का उपयोग:

mysql> select Price, case When Price IS NULL Then 0 else Price END AS Result from DemoTable703;

आउटपुट

+-------+--------+
| Price | Result |
+-------+--------+
| 102   | 102    |
| NULL  | 0      |
| 0     | 0      |
| 500   | 500    |
| 100   | 100    |
| NULL  | 0      |
| 2340  | 2340   |
+-------+--------+
7 rows in set (0.00 sec)

वैकल्पिक: `COALESCE(Price, 0)` या `IFNULL(Price, 0)` अधिक संक्षिप्त है।