如下运行我的查询时，我得到一个'非唯一表/别名：'PRICE''。经过几个小时的尝试，我坚持了下来！（这是一个改变的 MS SQL 查询）
SELECT
PRICE_GENERIC.`Part Description` AS post_title,
`PRICE_GENERIC`.`Part Description` AS post_name,
PRICE_GENERIC.`Material Long Description` AS post_excerpt,
"" AS post_content,
"publish" AS post_status,
"0" AS menu_order,
"02/22/2013 17:17" AS post_date,
"0" AS post_parent,
"closed" AS comment_status,
PRICE_GENERIC.`EANUPC Code` AS sku,
"visible" AS visibility,
PRICE_GENERIC.`Available Quantity` AS stock,
"instock" AS stock_status,
"no" AS backorders,
"" AS manage_stock,
PRICE_GENERIC.`Customer Price` AS regular_price,
"" AS sale_price,
PRICE.Weight AS weight,
PRICE.Length AS length,
PRICE.Width AS width,
PRICE.Height AS height,
"taxable" AS tax_status,
"*" AS tax_class,
"" AS upsell_ids,
"" AS crosssell_ids,
"" AS featured,
"" AS sale_price_dates_from,
"" AS sale_price_dates_to,
'http://' AS file_path,
"" AS download_limit,
"" AS external_url,
"" AS images,
categories_adj.HOOFDCATEGORIE AS `tax:product_cat`,
"" AS `tax:product_tag`,
"simple" AS `tax:product_type`
FROM
PRICE_GENERIC,
categories_adj,
PRICE
INNER JOIN `FEES_GENERIC` ON `PRICE_GENERIC`.`Part Number` = `FEES_GENERIC`.`Part Number`
INNER JOIN `HOURLY_STOCK_GENERIC` ON `PRICE_GENERIC`.`Part Number` = `HOURLY_STOCK_GENERIC`.`Part Number`
INNER JOIN `PRICE` ON `PRICE_GENERIC`.`Part Number` = `PRICE`.`Part Number`
INNER JOIN `CATEGORIES` ON `PRICE`.`Sub-Category` = `CATEGORIES`.`Product Hierarchy Number Level 2`
INNER JOIN `categories_adj` ON `CATEGORIES`.`Product Hierarchy Number Level 2` = `categories_adj`.`Product Hierarchy Number Level 2`
WHERE
`categories_adj`.`HOOFDCATEGORIE` IS NOT NULL
;