How to Efficiently Search for Values in Comma-Separated MySQL Field Lists?

Searching for Values in Comma-Separated MySQL Field Lists

This issue arises when a MySQL field contains comma-separated IDs, e.g., "12,13,14,16." Attempting to search within this field using the LIKE operator with a simple substring match, such as "SELECT ... WHERE field LIKE '%1%'", yields poor results due to the high occurrence of common IDs in a specific range.

To address this problem effectively, utilize the FIND_IN_SET function. This function checks whether a specified value exists within a comma-separated string and returns the position of that value if found. For instance, the following query efficiently locates rows where the value '1' is present in the 'field' field:

SELECT ... WHERE FIND_IN_SET('1', field)

This solution performs precise filtering by searching for the exact value within the specified comma-separated list, preventing the false positives encountered with the LIKE operator.

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