SelectSUBSTRING_INDEX('MyNameisRam','a',3);+-------------------------- -------------+|SUBSTRING_INDEX('MyNameisRam',&a"/> SelectSUBSTRING_INDEX('MyNameisRam','a',3);+-------------------------- -------------+|SUBSTRING_INDEX('MyNameisRam',&a">

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What happens if the value of parameter 'count' in the MySQL SUBSTRING_INDEX() function is greater than the total number of delimiter occurrences?

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2023-09-02 14:49:07854browse

如果 MySQL SUBSTRING_INDEX() 函数中的参数“count”的值大于分隔符出现的总数,会发生什么情况?

If the value of parameter "count" is greater than the total number of delimiter occurrences, the MySQL SUBSTRING_INDEX() function will return the same string as the output. This can be demonstrated with the following example -

mysql> Select SUBSTRING_INDEX('My Name is Ram','a',3);
+-----------------------------------------+
| SUBSTRING_INDEX('My Name is Ram','a',3) |
+-----------------------------------------+
| My Name is Ram                          |
+-----------------------------------------+
1 row in set (0.00 sec)

The above query returns the same string because 3 is greater than the total number of occurrences of the delimiter (i.e. "a") provided as parameter. There are only two "a"s in the string.

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