Table:
0
A
B
C
D
E
F
1
District
Incumbent
Party
First elected
Result
Candidates
2
California 1
Clarence F. Lea
Democratic
1916
Re-elected
Clarence F. Lea (D) Unopposed
3
California 2
Clair Engle
Democratic
1943
Re-elected
Clair Engle (D) Unopposed
4
California 3
J. Leroy Johnson
Republican
1942
Re-elected
J. Leroy Johnson (R) Unopposed
5
California 5
Richard J. Welch
Republican
1926
Re-elected
Richard J. Welch (R) Unopposed
6
California 6
George Paul Miller
Democratic
1944
Re-elected
George Paul Miller (D) Unopposed
7
California 8
Jack Z. Anderson
Republican
1938
Re-elected
Jack Z. Anderson (R) Unopposed
8
California 10
Alfred J. Elliott
Democratic
1937
Re-elected
Alfred J. Elliott (D) Unopposed
9
California 13
Ned R. Healy
Democratic
1944
Lost re-election Republican gain
Norris Poulson (R) 51.8% Ned R. Healy (D) 48.2%
10
California 15
Gordon L. McDonough
Republican
1944
Re-elected
Gordon L. McDonough (R) Unopposed
11
California 17
Cecil R. King
Democratic
1942
Re-elected
Cecil R. King (D) Unopposed
12
California 18
Clyde Doyle
Democratic
1944
Lost re-election Republican gain
Willis W. Bradley (R) 52.8% Clyde Doyle (D) 47.2%

Questions and formulas:
Question:  how many result with candidates being richard j. welch (r) unopposed
Formula: ROWS(UNIQUE(FILTER(E1, F1="Richard J. Welch (R) Unopposed")))
Formula2: ROWS(UNIQUE(FILTER(E2:E12, F2:F12="Richard J. Welch (R) Unopposed")))
Level: medium
Question: what's the result with incumbent being jack z. anderson
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,B1="Jack Z. Anderson"),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F12,B2:B12="Jack Z. Anderson"),5))
Level: medium
Question: what's the district with result being re-elected and candidates being clarence f. lea (d) unopposed
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,(E1="Re-elected")*(F1="Clarence F. Lea (D) Unopposed")),1))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F12,(E2:E12="Re-elected")*(F2:F12="Clarence F. Lea (D) Unopposed")),1))
Level: medium
Question: what's the first elected with incumbent being clair engle
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,B1="Clair Engle"),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F12,B2:B12="Clair Engle"),4))
Level: medium
Question: who is the the candidates with incumbent being alfred j. elliott
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,B1="Alfred J. Elliott"),6))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F12,B2:B12="Alfred J. Elliott"),6))
Level: medium
Question: who is the the incumbent with candidates being jack z. anderson (r) unopposed
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,F1="Jack Z. Anderson (R) Unopposed"),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F12,F2:F12="Jack Z. Anderson (R) Unopposed"),2))
Level: medium