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Finding number of occurrences of a specific string in MySQL?
Use LENGTH() for this. Let us first create a table −
mysql> create table DemoTable -> ( -> Value text -> ); Query OK, 0 rows affected (0.74 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable values('10,20,10,30,10,40,50,40');
Query OK, 1 row affected (0.24 sec)Display all records from the table using select statement −
mysql> select *from DemoTable;
Output
This will produce the following output −
+-------------------------+ | Value | +-------------------------+ | 10,20,10,30,10,40,50,40 | +-------------------------+ 1 row in set (0.00 sec)
Following is the query to find number of occurrences of a specific string in MySQL. The occurrence of ‘10’ is what we are finding here −
mysql> select LENGTH(Value) + 2 -LENGTH(REPLACE(CONCAT(',', Value, ','), ',10,', 'len'))from DemoTable;Output
This will produce the following output −
+----------------------------------------------------------------------------+
| LENGTH(Value) + 2 -LENGTH(REPLACE(CONCAT(',', Value, ','), ',10,', 'len')) |
+----------------------------------------------------------------------------+
| 3 |
+----------------------------------------------------------------------------+
1 row in set (0.00 sec)
Updated on: 30-Jun-2020
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