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Use a WAY MORE Efficient query when filling out filter selection boxes by using EXIST instead of DISTINCT selections

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johnnyq
2025-08-15 20:39:23 -04:00
parent 4ef1e91c78
commit a0ced96d1d
9 changed files with 15 additions and 20 deletions
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2
user/invoices.php
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@@ -196,7 +196,7 @@ $num_rows = mysqli_fetch_row(mysqli_query($mysqli, "SELECT FOUND_ROWS()"));
<option value="">- All Categories -</option>
<?php
$sql_categories_filter = mysqli_query($mysqli, "SELECT * FROM categories WHERE category_type = 'Income' ORDER BY category_name ASC");
$sql_categories_filter = mysqli_query($mysqli, "SELECT category_id, category_name FROM categories WHERE category_type = 'Income' AND EXISTS (SELECT 1 FROM invoices WHERE invoice_category_id = category_id) ORDER BY category_name ASC");
while ($row = mysqli_fetch_array($sql_categories_filter)) {
$category_id = intval($row['category_id']);
$category_name = nullable_htmlentities($row['category_name']);