In the provided PHP code, what does GROUP BY ('kat') signify?

GROUP BY ('kat') in the provided PHP code signifies that the query is trying to group the results based on the column 'kat'. However, the correct syntax for using GROUP BY in SQL is to specify the column name without quotes. Therefore, to fix this issue, we need to remove the quotes around 'kat' in the GROUP BY clause. 

// Incorrect query with GROUP BY ('kat')
$query = "SELECT kat, COUNT(*) as count FROM table_name GROUP BY ('kat')";

// Corrected query with GROUP BY kat
$query = "SELECT kat, COUNT(*) as count FROM table_name GROUP BY kat";

Keywords

PHP GROUP BY SQL database query

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