如何在SQL Server中使用TOP

Question

我在下面有此代码：

public function findAllByPagePlain($limit, $offset, $q, $category_id, $column, $order)
    {
        $query = "SELECT DISTINCT TOP $limit p.* FROM ec_product p ";
        $keywordQuery = "(p.name REGEXP '$q' OR p.status REGEXP '$q' OR p.description REGEXP '$q') ";
        if ($category_id != -1) {
            $query = $query . ", product_category pc WHERE pc.product_id=p.id AND pc.category_id=$category_id ";
            if ($q != "") $query = $query . "AND " . $keywordQuery;
        } else {
            if ($q != "") $query = $query . "WHERE " . $keywordQuery;
        }
        $query = $query . "ORDER BY p." . $column . " " . $order . " OFFSET $offset ";
        return $this->db->get_list($query);
    }

我正在尝试使用TOP首先从数据库中获取n rows。但它总是给我一个错误，说

Array ( [0] => Array ( [0] => 42000 [SQLSTATE] => 42000 [1] => 102 [code] => 102 [2] => [Microsoft][ODBC Driver 17 for SQL Server][SQL Server]Incorrect syntax near '0'. [message] => [Microsoft][ODBC Driver 17 for SQL Server][SQL Server]Incorrect syntax near '0'. ) )

任何人都知道如何解决此问题吗？

Answer 1

错误的原因是事实，您没有为OFFSET ... FETCH子句使用正确的语法。您应该像下面的示例一样更改函数，但是您应该重写代码并使用参数化的语句（如注释中所述）。

<?php
public function findAllByPagePlain($limit, $offset, $q, $category_id, $column, $order)
    {
        $query = "SELECT DISTINCT p.* FROM ec_product p ";
        $keywordQuery = "(p.name REGEXP '$q' OR p.status REGEXP '$q' OR p.description REGEXP '$q') ";
        if ($category_id != -1) {
            $query = $query . ", product_category pc WHERE pc.product_id=p.id AND pc.category_id=$category_id ";
            if ($q != "") $query = $query . "AND " . $keywordQuery;
        } else {
            if ($q != "") $query = $query . "WHERE " . $keywordQuery;
        }
        $query = $query . "ORDER BY p." . $column . " " . $order . " OFFSET ". $offset . " ROWS FETCH NEXT " . $limit. " ROWS ONLY";
        return $this->db->get_list($query);
    }
?>