我正在尝试使用条件where子句，这意味着我有三个表rds，
rds_distr，product以及如果rds_distr_cd = 'A'，那么我只想显示剩下的一行。
表格结构和一些数据 -
CREATE TABLE [dbo].[product](
[prod_cd] [varchar](20) NOT NULL,
[prod_name] [varchar](100) NOT NULL,
[prod_short_name] [varchar](100) NOT NULL,
[uom_cd] [varchar](4) NOT NULL,
[inner_qty_mul_val] [decimal](5, 2) NULL,
[prod_catg_cd] [varchar](4) NOT NULL,
[prod_line_cd] [varchar](4) NOT NULL,
[prod_brand_cd] [int] NOT NULL,
[prod_grp_cd] [varchar](4) NULL,
[prod_subgrp_cd] [varchar](4) NULL,
[combi_prod_flg] [varchar](1) NULL,
[bar_code] [varchar](50) NULL,
[remark] [varchar](250) NULL,
[active_flg] [varchar](1) NOT NULL,
[time_stamp] [bigint] NOT NULL,
[simpl_prod_desc] [varchar](100) NULL,
[inside_schm_desc] [varchar](100) NULL,
[prod_type] [varchar](1) NULL,
[mbl_active_flg] [varchar](1) NULL,
[hsn_cd] [varchar](20) NULL,
CONSTRAINT [product_pk] PRIMARY KEY CLUSTERED
(
[prod_cd] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
/****** Object: Table [dbo].[rds] Script Date: 8/31/2017 11:42:24 AM ******/
CREATE TABLE [dbo].[rds](
[rds_cd] [varchar](10) NOT NULL,
[rds_name] [varchar](100) NOT NULL,
[rds_short_name] [varchar](50) NOT NULL,
[comp_cd] [varchar](4) NULL,
[locn_cd] [varchar](4) NULL,
[hq_town_cd] [int] NULL,
[rds_type_cd] [varchar](1) NULL,
[rds_distr_cd] [varchar](1) NULL,
[apoint_dt] [datetime] NULL,
[resign_dt] [datetime] NULL,
[eff_start_dt] [datetime] NULL,
[eff_end_dt] [datetime] NULL,
[agreement_dt] [datetime] NULL,
[sec_amt] [numeric](9, 2) NULL,
[ref_no] [varchar](50) NULL,
[area] [varchar](100) NULL,
[block_flg] [varchar](1) NULL,
[vacant_flg] [varchar](1) NULL,
[active_flg] [varchar](1) NOT NULL,
[mobile_no_1] [varchar](20) NULL,
[mobile_no_2] [varchar](20) NULL,
[time_stamp] [bigint] NOT NULL DEFAULT ((0)),
CONSTRAINT [rds_pk] PRIMARY KEY CLUSTERED
(
[rds_cd] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
/****** Object: Table [dbo].[rds_distr] Script Date: 8/31/2017 11:42:24 AM ******/
CREATE TABLE [dbo].[rds_distr](
[rds_distr_seq] [int] IDENTITY(1,1) NOT NULL,
[rds_cd] [varchar](10) NULL,
[prod_line_cd] [varchar](4) NULL,
[prod_brand_cd] [int] NULL,
[start_dt] [datetime] NULL,
[end_dt] [datetime] NULL,
CONSTRAINT [rds_distr_pk] PRIMARY KEY CLUSTERED
(
[rds_distr_seq] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
GO
ALTER TABLE [dbo].[rds_distr] WITH NOCHECK ADD CONSTRAINT [rds_distr@rds] FOREIGN KEY([rds_cd])
REFERENCES [dbo].[rds] ([rds_cd])
GO
ALTER TABLE [dbo].[rds_distr] CHECK CONSTRAINT [rds_distr@rds]
GO
INSERT [dbo].[rds] ([rds_cd], [rds_name], [rds_short_name], [comp_cd], [locn_cd], [hq_town_cd], [rds_type_cd], [rds_distr_cd], [apoint_dt], [resign_dt], [eff_start_dt], [eff_end_dt], [agreement_dt], [sec_amt], [ref_no], [area], [block_flg], [vacant_flg], [active_flg], [mobile_no_1], [mobile_no_2], [time_stamp]) VALUES (N'INMHA142', N'Amar Trading Co', N'Amar Trading Co', N'SEN', N'PNE', 50, N'R', N'A', CAST(N'2013-07-29 00:00:00.000' AS DateTime), NULL, CAST(N'2013-07-29 00:00:00.000' AS DateTime), NULL, NULL, NULL, NULL, NULL, N'N', N'N', N'Y', NULL, NULL, 0)
INSERT [dbo].[rds] ([rds_cd], [rds_name], [rds_short_name], [comp_cd], [locn_cd], [hq_town_cd], [rds_type_cd], [rds_distr_cd], [apoint_dt], [resign_dt], [eff_start_dt], [eff_end_dt], [agreement_dt], [sec_amt], [ref_no], [area], [block_flg], [vacant_flg], [active_flg], [mobile_no_1], [mobile_no_2], [time_stamp]) VALUES (N'INMHA141', N'Atharv Traders', N'Atharv Traders', N'SEN', N'PNE', 152, N'A', N'A', CAST(N'2013-07-01 00:00:00.000' AS DateTime), NULL, CAST(N'2013-07-01 00:00:00.000' AS DateTime), NULL, NULL, NULL, NULL, NULL, N'N', N'N', N'Y', NULL, NULL, 0)
INSERT [dbo].[rds] ([rds_cd], [rds_name], [rds_short_name], [comp_cd], [locn_cd], [hq_town_cd], [rds_type_cd], [rds_distr_cd], [apoint_dt], [resign_dt], [eff_start_dt], [eff_end_dt], [agreement_dt], [sec_amt], [ref_no], [area], [block_flg], [vacant_flg], [active_flg], [mobile_no_1], [mobile_no_2], [time_stamp]) VALUES (N'INMHM129', N'Mittal Agency', N'Mittal Agency', N'SEN', N'PNE', 50, N'R', N'B', CAST(N'2014-04-03 00:00:00.000' AS DateTime), NULL, CAST(N'2014-04-03 00:00:00.000' AS DateTime), NULL, NULL, NULL, NULL, NULL, N'N', N'N', N'Y', NULL, NULL, 1500890410)
INSERT [dbo].[rds] ([rds_cd], [rds_name], [rds_short_name], [comp_cd], [locn_cd], [hq_town_cd], [rds_type_cd], [rds_distr_cd], [apoint_dt], [resign_dt], [eff_start_dt], [eff_end_dt], [agreement_dt], [sec_amt], [ref_no], [area], [block_flg], [vacant_flg], [active_flg], [mobile_no_1], [mobile_no_2], [time_stamp]) VALUES (N'INMHK083', N'Krishna Traders', N'Krishna Traders', N'SEN', N'PNE', 50, N'R', N'P', CAST(N'2014-12-26 00:00:00.000' AS DateTime), NULL, CAST(N'2014-12-26 00:00:00.000' AS DateTime), NULL, NULL, NULL, NULL, NULL, N'N', N'N', N'Y', NULL, NULL, 1504005202)
set identity_insert rds_distr on
INSERT [dbo].[rds_distr] ([rds_distr_seq], [rds_cd], [prod_line_cd], [prod_brand_cd], [start_dt], [end_dt]) VALUES (1099, N'INMHK083', N'01', NULL, CAST(N'2017-08-01 00:00:00.000' AS DateTime), NULL)
INSERT [dbo].[rds_distr] ([rds_distr_seq], [rds_cd], [prod_line_cd], [prod_brand_cd], [start_dt], [end_dt]) VALUES (1100, N'INMHK083', N'06', NULL, CAST(N'2017-08-01 00:00:00.000' AS DateTime), NULL)
INSERT [dbo].[rds_distr] ([rds_distr_seq], [rds_cd], [prod_line_cd], [prod_brand_cd], [start_dt], [end_dt]) VALUES (1098, N'INMHM129', NULL, 1, CAST(N'2001-01-01 00:00:00.000' AS DateTime), NULL)
INSERT [dbo].[product] ([prod_cd], [prod_name], [prod_short_name], [uom_cd], [inner_qty_mul_val], [prod_catg_cd], [prod_line_cd], [prod_brand_cd], [prod_grp_cd], [prod_subgrp_cd], [combi_prod_flg], [bar_code], [remark], [active_flg], [time_stamp], [simpl_prod_desc], [inside_schm_desc], [prod_type], [mbl_active_flg], [hsn_cd]) VALUES (N'DEN101050001', N'Aps Pltnm Rt Pncl/Lpsh,Nder/10X10', N'Aps Pltnm Rt Pncl/Lpsh,Nder/10X10', N'BOX', CAST(0.10 AS Decimal(5, 2)), N'FG', N'01', 1, NULL, NULL, N'N', NULL, NULL, N'Y', 1500634997, N'Aps Pltnm Rt Pncl/Lpsh,Nder/10X10 101050001', NULL, N'M', N'Y', NULL)
INSERT [dbo].[product] ([prod_cd], [prod_name], [prod_short_name], [uom_cd], [inner_qty_mul_val], [prod_catg_cd], [prod_line_cd], [prod_brand_cd], [prod_grp_cd], [prod_subgrp_cd], [combi_prod_flg], [bar_code], [remark], [active_flg], [time_stamp], [simpl_prod_desc], [inside_schm_desc], [prod_type], [mbl_active_flg], [hsn_cd]) VALUES (N'DEN101049001', N'Aps Stn Pncl/Lpsh,Nder/10X100', N'Aps Stn Pncl/Lpsh,Nder/10X10', N'BOX', CAST(0.10 AS Decimal(5, 2)), N'FG', N'01', 1, NULL, NULL, N'N', NULL, NULL, N'Y', 1500634997, N'Aps Stn Pncl/Lpsh,Nder/10X100 101049001', N'Sharpner', N'M', N'Y', NULL)
INSERT [dbo].[product] ([prod_cd], [prod_name], [prod_short_name], [uom_cd], [inner_qty_mul_val], [prod_catg_cd], [prod_line_cd], [prod_brand_cd], [prod_grp_cd], [prod_subgrp_cd], [combi_prod_flg], [bar_code], [remark], [active_flg], [time_stamp], [simpl_prod_desc], [inside_schm_desc], [prod_type], [mbl_active_flg], [hsn_cd]) VALUES (N'DEN101054001', N'Aps Ntrl R/T Pncl/LPSh,NDEr/10x10', N'Aps Ntrl R/T Pncl/LPSh,NDEr/10x10', N'BOX', CAST(0.10 AS Decimal(5, 2)), N'FG', N'01', 1, NULL, NULL, N'N', NULL, NULL, N'N', 1, N'Aps Ntrl R/T Pncl/LPSh,NDEr/10x10 101054001', NULL, N'M', N'N', NULL)
我试过这个 -
select rds_cd, prod_cd,rds_distr_cd from
(select distinct r.rds_cd,prod_cd,case when r.rds_distr_cd = 'A' then 0 when r.rds_distr_cd = 'B' then 1 when r.rds_distr_cd = 'P' THEN 2 END AS rds_distr_cd
from product p,rds r left join rds_distr rd on r.rds_cd = rd.rds_cd
where r.rds_distr_cd ='A'
AND ( r.rds_cd in ('INMHA142','INMHK083','INMHM129')
and p.prod_cd in ('DEN101050001')
)
OR (r.rds_distr_cd in ('B','p')
AND r.rds_cd = rd.rds_cd
and (rd.prod_brand_cd =p.prod_brand_cd
or rd.prod_line_cd = p.prod_line_cd)
and r.rds_cd in ('INMHA142','INMHK083','INMHM129')
and p.prod_cd in ('DEN101050001')
)) as a
where rds_distr_cd = IIF(rds_distr_cd = 0,0,0)
OR rds_distr_cd =IIF(rds_distr_cd = 1,1,1)
获得结果 -
rds_cd prod_cd rds_distr_cd
INMHA142 DEN101050001 0
INMHM129 DEN101050001 1
我希望如果rds_distr_cd为0，则只显示一行，否则显示第二行。
答案 0 :(得分：0)
where条款中包含AND和{}的多个条件OR。除非您正确使用圆括号，否则它将无法按预期工作。
将您的where条款更改为：
where r.rds_distr_cd ='A'
AND (( r.rds_cd in ('INMHA142','INMHK083','INMHM129')
and p.prod_cd in ('DEN101050001')
)
OR (r.rds_distr_cd in ('B','p')
AND r.rds_cd = rd.rds_cd
and (rd.prod_brand_cd =p.prod_brand_cd
or rd.prod_line_cd = p.prod_line_cd
)
and r.rds_cd in ('INMHA142','INMHK083','INMHM129')
and p.prod_cd in ('DEN101050001')
)
)
修改：包含OR作为第二个条件的一部分（在AND内）。
结果为SQL Fiddle。
答案 1 :(得分：0)
经过这么多尝试，我得到了解决方案
IF EXISTS (select distinct r.rds_cd,prod_cd, r.rds_distr_cd
from product p,rds r
where r.rds_distr_cd ='A'
AND r.rds_cd in ('INMHA142','INMHK083','INMHM129')
and p.prod_cd in ('DEN101050001'))
BEGIN
select distinct r.rds_cd,prod_cd, r.rds_distr_cd
from product p,rds r
where r.rds_distr_cd ='A'
AND r.rds_cd in ('INMHA142','INMHK083','INMHM129')
and p.prod_cd in ('DEN101050001')
END
ELSE
BEGIN
select distinct r.rds_cd,prod_cd, r.rds_distr_cd
from product p,rds r left join rds_distr rd on r.rds_cd = rd.rds_cd
where r.rds_distr_cd in ('B','p')
AND r.rds_cd in ('INMHA142','INMHK083','INMHM129')
and p.prod_cd in ('DEN101050001')
END