Question

我有这个查询从多个表中提取数据。

SELECT ph.list_header_id
     ,phtl.name
     ,mtl.segment1
     ,mtl.description
     ,pl.list_price_uom_code
     ,pl.price_break_type_code
     ,pl.list_price
     ,ph.currency_code
     ,pl.start_date_active
     ,pl.end_date_active
    FROM qp_list_headers_b ph
    LEFT OUTER JOIN qp_list_headers_tl phtl ON phtl.list_header_id = ph.list_header_id
                                       AND phtl.language = userenv('LANG') 
    LEFT OUTER JOIN qp_list_lines pl ON pl.list_header_id = ph.list_header_id
    LEFT OUTER JOIN mtl_parameters mp ON mp.master_organization_id = mp.organization_id
    LEFT OUTER JOIN mtl_system_items_b mtl ON mtl.inventory_item_id = pl.inventory_item_id
                                      AND mtl.organization_id = mp.organization_id
    WHERE ph.list_header_id BETWEEN :p_header_id_start AND :p_header_id_end
    AND pl.start_date_active BETWEEN :p_start_date AND :p_end_date

问题在于，如果日期中有空值，则不会拉出该行（当它们为空时也适用于其他列）

如何解决此问题？非常感谢

Answer 1

您可以从

更改最后一个条件

AND pl.start_date_active BETWEEN :p_start_date AND :p_end_date

到

AND (
     pl.start_date_active IS NULL
     OR pl.start_date_active BETWEEN :p_start_date AND :p_end_date
)

如何使此查询显示所有行，即使它们具有日期的NULLS？

1 个答案: