relationships between tables in sql server - sql-server

Question

I have one table with 6 columns. I have another 6 tables with two columns.Each of these 6 tables have id column and value column.These 6 tables are dropdowns in my app, and I want now each value from dropdown e.g from one table of these 6 to be referenced somehow with first table which has 6 columns that supposed to be ID foreach of these 6 columns ID.I trying with hours but I cant reference these tables.E.g when user pick some value from dropdown, how first table with six columns to know what value is selected from another table.Could anyone help me here?Thanks

Answer 1

Welcome to StackOverflow!
If I got you right (I hope so), you want to create one table containing foreign-key columns referencing to the Dropdown values. So, each row contains 6 dropdown values.
Is this what you're looking for?
--Data Tables
CREATE TABLE [DropDownTable1]
(
[DropDownTable1Id] INT Identity(1,1) NOT NULL,
[Name] VARCHAR(32) NOT NULL,
CONSTRAINT [pk__dropdowntable1] PRIMARY KEY CLUSTERED ([DropDownTable1Id] ASC)
);
CREATE TABLE [DropDownTable2]
(
[DropDownTable2Id] INT Identity(1,1) NOT NULL,
[Name] VARCHAR(32) NOT NULL,
CONSTRAINT [pk__dropdowntable2] PRIMARY KEY CLUSTERED ([DropDownTable2Id] ASC)
);
CREATE TABLE [DropDownTable3]
(
[DropDownTable3Id] INT Identity(1,1) NOT NULL,
[Name] VARCHAR(32) NOT NULL,
CONSTRAINT [pk__dropdowntable3] PRIMARY KEY CLUSTERED ([DropDownTable3Id] ASC)
);
CREATE TABLE [DropDownTable4]
(
[DropDownTable4Id] INT Identity(1,1) NOT NULL,
[Name] VARCHAR(32) NOT NULL,
CONSTRAINT [pk__dropdowntable4] PRIMARY KEY CLUSTERED ([DropDownTable4Id] ASC)
);
CREATE TABLE [DropDownTable5]
(
[DropDownTable5Id] INT Identity(1,1) NOT NULL,
[Name] VARCHAR(32) NOT NULL,
CONSTRAINT [pk__dropdowntable5] PRIMARY KEY CLUSTERED ([DropDownTable5Id] ASC)
);
CREATE TABLE [DropDownTable6]
(
[DropDownTable6Id] INT Identity(1,1) NOT NULL,
[Name] VARCHAR(32) NOT NULL,
CONSTRAINT [pk__dropdowntable6] PRIMARY KEY CLUSTERED ([DropDownTable6Id] ASC)
);
--Table with relations
CREATE TABLE [TbWithSixColumns]
(
[TbWithSixColumnsId] INT Identity(1,1) NOT NULL,
[DropDownTable1Id] INT NOT NULL,
[DropDownTable2Id] INT NOT NULL,
[DropDownTable3Id] INT NOT NULL,
[DropDownTable4Id] INT NOT NULL,
[DropDownTable5Id] INT NOT NULL,
[DropDownTable6Id] INT NOT NULL,
CONSTRAINT [pk__tbwithsixcolumns] PRIMARY KEY CLUSTERED ([TbWithSixColumnsId] ASC),
CONSTRAINT [fk__tbwithsixcolumns__dropdowntable1id] FOREIGN KEY([DropDownTable1Id]) REFERENCES [DropDownTable1]([DropDownTable1Id]),
CONSTRAINT [fk__tbwithsixcolumns__dropdowntable2id] FOREIGN KEY([DropDownTable2Id]) REFERENCES [DropDownTable2]([DropDownTable2Id]),
CONSTRAINT [fk__tbwithsixcolumns__dropdowntable3id] FOREIGN KEY([DropDownTable3Id]) REFERENCES [DropDownTable3]([DropDownTable3Id]),
CONSTRAINT [fk__tbwithsixcolumns__dropdowntable4id] FOREIGN KEY([DropDownTable4Id]) REFERENCES [DropDownTable4]([DropDownTable4Id]),
CONSTRAINT [fk__tbwithsixcolumns__dropdowntable5id] FOREIGN KEY([DropDownTable5Id]) REFERENCES [DropDownTable5]([DropDownTable5Id]),
CONSTRAINT [fk__tbwithsixcolumns__dropdowntable6id] FOREIGN KEY([DropDownTable6Id]) REFERENCES [DropDownTable6]([DropDownTable6Id])
);
--Populate Test-Data
INSERT INTO [DropDownTable1] ([Name]) VALUES ('Dropdownentry 1.1')
INSERT INTO [DropDownTable2] ([Name]) VALUES ('Dropdownentry 2.1')
INSERT INTO [DropDownTable3] ([Name]) VALUES ('Dropdownentry 3.1')
INSERT INTO [DropDownTable4] ([Name]) VALUES ('Dropdownentry 4.1')
INSERT INTO [DropDownTable5] ([Name]) VALUES ('Dropdownentry 5.1')
INSERT INTO [DropDownTable6] ([Name]) VALUES ('Dropdownentry 6.1')
INSERT INTO [TbWithSixColumns] ([DropDownTable1Id],[DropDownTable2Id],[DropDownTable3Id],[DropDownTable4Id],[DropDownTable5Id],[DropDownTable6Id]) VALUES (1,1,1,1,1,1);
--Query the dropdown data
SELECT t1.Name, t2.Name, t3.Name, t4.Name, t5.Name, t6.Name
FROM [TbWithSixColumns] relationTb
INNER JOIN [DropDownTable1] t1 ON relationTb.DropDownTable1Id = t1.DropDownTable1Id
INNER JOIN [DropDownTable2] t2 ON relationTb.DropDownTable2Id = t2.DropDownTable2Id
INNER JOIN [DropDownTable3] t3 ON relationTb.DropDownTable3Id = t3.DropDownTable3Id
INNER JOIN [DropDownTable4] t4 ON relationTb.DropDownTable4Id = t4.DropDownTable4Id
INNER JOIN [DropDownTable5] t5 ON relationTb.DropDownTable5Id = t5.DropDownTable5Id
INNER JOIN [DropDownTable6] t6 ON relationTb.DropDownTable6Id = t6.DropDownTable6Id
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I hope I could help you.