SQL Server Join unequal number of rows - sql-server

Question

I have data like the below, and would like to see results like below.
The blank spaces should be present in the results. Either Table 2 or Table 3 may contain more rows than the other, and blanks/or/nulls should be in the result.
Table 1
C1=29 (pk) C2=4133
C1=33 (pk) C2=9375
Table 2
C1=29(fk) C2=Adam
C1=29(fk) C2=Bob
C1=29(fk) C2=Chris
C1=29(fk) C2=Dave
C1=33(fk) C2=Eddie
C1=33(fk) C2=Frank
Table 3
C1=29(fk) C2=Helen
C1=29(fk) C2=Joice
C1=33(fk) C2=Karen
C1=33(fk) C2=Laura
C1=33(fk) C2=Mary
Desired result
1.C1=29 1.C2=4133 2.C2=Adam 3.C2=Helen
1.C1=29 1.C2=4133 2.C2=Bob 3.C2=Joice
1.C1=29 1.C2=4133 2.C2=Chris
1.C1=29 1.C2=4133 2.C2=Dave
1.C1=33 1.C2=9375 2.C2=Eddie 3.C2=Karen
1.C1=33 1.C2=9375 2.C2=Frank 3.C2=Laura
1.C1=33 1.C2=9375 3.C2=Mary
Rohit-s query gives --
SELECT t1.col1, t1.col2, t2.col2, t3.col2
FROM dbo.Table1 t1
LEFT JOIN dbo.Table2 t2 ON t1.col1 = t2.col1
LEFT JOIN dbo.Table3 t3 ON t1.col1 = t3.col1
col1 col2 col2 col2
29 4133 Adam Helen
29 4133 Adam Joice
29 4133 Bob Helen
29 4133 Bob Joice
29 4133 Chris Helen
29 4133 Chris Joice
29 4133 Dave Helen
29 4133 Dave Joice
33 9375 Eddie Karen
33 9375 Eddie Laura
33 9375 Eddie Mary
33 9375 Frank Karen
33 9375 Frank Laura
33 9375 Frank Mary
SQL FIDDLE LINK

Answer 1

Can't you just LEFT JOIN all the tables?
Eg:
SELECT t1.C1, t1.C2,t2.C2, t3.C2
FROM Table1 t1
LEFT JOIN Table2 t2 ON t1.C1 = t2.C1
LEFT JOIN Table3 t3 on t1.C1 = t3.C1
EDIT :
Based on your edit, and hoping things are ordered:
SELECT t1.C1, t1.C2, t2.C2, t3.C2
FROM Table1 t1
LEFT JOIN (
SELECT C1, C2, row_number() OVER (ORDER BY C1, C2) AS row_num
FROM Table2
) t2 ON t1.C1 = t2.C1
LEFT JOIN (
SELECT C1, C2, row_number() OVER (ORDER BY C1, C2) AS row_num
FROM Table3
) t3 ON t1.C1 = t3.C1 AND t3.row_num = t2.row_num
EDIT 2 :
Assuming everything is in order, (Row_Number and Dense_Rank):
SELECT t1.C1, t1.C2, t2.C2, t3.C2
FROM Table1 t1
LEFT JOIN (
SELECT C1, C2, DENSE_RANK() OVER (
ORDER BY C1
) AS group_num, row_number() OVER (
PARTITION BY C1 ORDER BY C1, C2
) AS row_num
FROM Table2
) t2 ON t1.C1 = t2.C1
LEFT JOIN (
SELECT C1, C2, DENSE_RANK() OVER (
ORDER BY C1
) AS group_num, row_number() OVER (
PARTITION BY C1 ORDER BY C1, C2
) AS row_num
FROM Table3
) t3 ON t1.C1 = t3.C1 AND t3.group_num = t2.group_num AND t3.row_num = t2.row_num
EDIT 3:
Dense_Rank, Row_Number, Union
SELECT t1.C1 AS T1C1, t1.C2 AS T1C2, t2.C2 AS T2C2, t3.C2 AS T3C3
FROM Table1 t1
LEFT JOIN (
SELECT C1, C2, DENSE_RANK() OVER (
ORDER BY C1
) AS group_num, row_number() OVER (
PARTITION BY C1 ORDER BY C1, C2
) AS row_num
FROM Table2
) t2 ON t1.C1 = t2.C1
LEFT JOIN (
SELECT C1, C2, DENSE_RANK() OVER (
ORDER BY C1
) AS group_num, row_number() OVER (
PARTITION BY C1 ORDER BY C1, C2
) AS row_num
FROM Table3
) t3 ON t1.C1 = t3.C1 AND t3.group_num = t2.group_num AND t3.row_num = t2.row_num
UNION
SELECT t1.C1, t1.C2, t2.C2, t3.C2
FROM Table1 t1
LEFT JOIN (
SELECT C1, C2, DENSE_RANK() OVER (
ORDER BY C1
) AS group_num, row_number() OVER (
PARTITION BY C1 ORDER BY C1, C2
) AS row_num
FROM Table3
) t3 ON t1.C1 = t3.C1
LEFT JOIN (
SELECT C1, C2, DENSE_RANK() OVER (
ORDER BY C1
) AS group_num, row_number() OVER (
PARTITION BY C1 ORDER BY C1, C2
) AS row_num
FROM Table2
) t2 ON t1.C1 = t2.C1 AND t3.group_num = t2.group_num AND t3.row_num = t2.row_num
ORDER BY T1C1, T1C2, T2C2, T3C3
EDIT 4 :
Dense_Rank, Row_Number, Union, SubQuery, Order By
SELECT *
FROM (
SELECT t1.Col1 AS T1C1, t1.Col2 AS T1C2, t2.Col2 AS T2C2, t3.Col2 AS T3C3
FROM Table1 t1
LEFT JOIN (
SELECT Col1, Col2, DENSE_RANK() OVER (
ORDER BY Col1
) AS group_num, row_number() OVER (
PARTITION BY Col1 ORDER BY Col1, Col2
) AS row_num
FROM Table2
) t2 ON t1.Col1 = t2.Col1
LEFT JOIN (
SELECT Col1, Col2, DENSE_RANK() OVER (
ORDER BY Col1
) AS group_num, row_number() OVER (
PARTITION BY Col1 ORDER BY Col1, Col2
) AS row_num
FROM Table3
) t3 ON t1.Col1 = t3.Col1
AND t3.group_num = t2.group_num
AND t3.row_num = t2.row_num
UNION
SELECT t1.Col1, t1.Col2, t2.Col2, t3.Col2
FROM Table1 t1
LEFT JOIN (
SELECT Col1, Col2, DENSE_RANK() OVER (
ORDER BY Col1
) AS group_num, row_number() OVER (
PARTITION BY Col1 ORDER BY Col1, Col2
) AS row_num
FROM Table3
) t3 ON t1.Col1 = t3.Col1
LEFT JOIN (
SELECT Col1, Col2, DENSE_RANK() OVER (
ORDER BY Col1
) AS group_num, row_number() OVER (
PARTITION BY Col1 ORDER BY Col1, Col2
) AS row_num
FROM Table2
) t2 ON t1.Col1 = t2.Col1
AND t3.group_num = t2.group_num
AND t3.row_num = t2.row_num
) AS SUB
ORDER BY T1C1, T1C2
, CASE WHEN T2C2 IS NULL THEN 1 ELSE 0 END
, CASE WHEN T3C3 IS NULL THEN 1 ELSE 0 END
SQL Fiddle Link