[英]Update multiple tables in one query, in MySQL
I want update my tables from csv. 我想从csv更新表格。 Now data from csv are imported to table "temp_update_stany", but i cant update tables.
现在,来自csv的数据被导入到表“ temp_update_stany”中,但是我无法更新表。 Query with no errors, but nothing is updated.
查询没有错误,但是没有任何更新。
Table from CSV is: CSV中的表格为:
produkt|quantity|price|active|czas
Query: 查询:
UPDATE lp2_product tabela
INNER JOIN lp2_stock_available stany ON (tabela.id_product = stany.id_product)
INNER JOIN lp2_product_lang lang ON (tabela.id_product = lang.id_product)
INNER JOIN temp_update_stany csv ON (tabela.id_product = csv.produkt)
SET
tabela.active = csv.active,
tabela.price = csv.price,
lang.available_now = csv.czas,
stany.quantity = csv.quantity
WHERE
csv.produkt = tabela.id_product
OR csv.produkt = lang.id_product
OR csv.produkt = stany.id_product
and output from query: 并从查询输出:
Modified records: 0 (Perform queries took 0.0322 seconds (s)).
but for example "lp2_product" /row 'active' have value 0 for all products and temp_update_stany have value 1 for all. 但例如,“ lp2_product” /行“活动”的所有产品的值为0,而temp_update_stany所有产品的值为1。
Yes, this is prestashop and simple script for update quantity and prices. 是的,这是用于更新数量和价格的prestashop和简单脚本。
As per comments above, the UPDATE
reports zero rows affected if there is no net change. 根据上面的评论,如果没有净变化,
UPDATE
报告受影响的零行。 So if the tables are already updated with the desired values, the UPDATE
is a no-op and no rows are "affected." 因此,如果表已使用所需的值进行了更新,则
UPDATE
是无操作的,并且不会“影响”行。
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