How to Extract the Third Word from a String in MySQL?

Obtaining the Third Instance of a Character in a MySQL String

In MySQL, you can use the SUBSTRING_INDEX function to determine the index of a specific occurrence of a character or string within a given string. This function can be leveraged to find the index of the third space in a string, allowing you to extract a specific portion of the string.

To achieve this, you can use a combination of nested SUBSTRING_INDEX functions as follows:

<code class="sql">SELECT SUBSTRING_INDEX(SUBSTRING_INDEX(field, ' ', 3), ' ', -1)
FROM table</code>

In this example, the innermost SUBSTRING_INDEX call starts searching for the first space in the field column starting from the first character. The 3 parameter specifies that we want to find the third occurrence of a space. This gives us the substring up to the third space, which is "AAAA BBBB CCCC."

The outermost SUBSTRING_INDEX call then takes this substring and starts searching for the last (or rightmost) occurrence of a space, indicated by the -1 parameter. This gives us the substring after the first three spaces, which is "CCCC." Therefore, by using these nested functions, you can efficiently extract the third space-separated word from the given string in MySQL.

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