SQL query between and equals - sql

Question

there are three tables, first table name is baseline which contains all beneficiaries information and one column in the name of PPI Score and the second table in the name of PPI_SCORE_TOOKUP which contains six columns as below the third table in the name of endline which contains beneficiaries end line assessment data and also one column in the name of PPI_Score, what i want is, to join some how these tables however there is no foreign key of the baseline and endline table in the PPI_SCORE_TOOKUP table there is only PPI_Score in the tables PPI_SCORE_TOOKUP, endline and endline tables, and i want to query to show some baseline data along PPI result if the values of the ppi in the basline table is between or equals to PPI_SCORE_START and PPI_SCORE_END and also it should show endline data of the same member along with the PPI Score with its six column if ppi score in the endline table is between and equals to PPI_SCORE_START and PPI_SCORE_END all in one row.
Note: i did not try any query yet since i did not have any idea how to do this, but i expect the expected result in the bottom of this question.
Tables are as follows
baseline table
ID NAME LAST_NAME DISTRICT PPI_SCORE
1 A A A 10
2 B B B 23
3 C C C 90
4 D D D 47
endline table
baseline_ID Enterprise Market PPI_SCORE
3 Bee Keeping Yes
2 Poultry No 74
1 Agriculture Yes 80
PPI_SCORE_TOOKUP table
ppi_start ppi_end national national_150 national_200 usaid
0 4 100 100 100 100
10 14 66.1 89.5 96.5 39.2
5 9 68.8 90.2 96.7 44.4
15 19 59.5 89.1 97.2 35.2
20 24 51.3 85.5 96.4 28.8
25 29 43.5 81.1 93.2 20
30 34 31.9 74.5 90.4 13.6
35 39 24.6 66.9 87.3 7.9
40 44 15.2 58 82.8 4.5
45 49 11.4 47.9 73.4 4.2
50 54 6 37.2 68.4 2.6
55 59 2.7 26.1 61.3 0.5
60 64 0.9 21 50.4 0.5
65 69 0 14.3 37.1 0
70 74 3 14.3 29.2 0
75 79 0 1.4 5.1 0
80 84 0 0 9.5 0
85 89 0 0 15.2 0
90 94 0 0 0 0
95 100 0 0 0 0
Expected Result

Answer 1

Your query can be made in the following way:
SELECT *
FROM baseline b
LEFT JOIN endline e ON b.id = e.baseline_ID
LEFT JOIN PPI_SCORE_TOOKUP ppi ON b.PPI_SCORE BETWEEN ppi.ppi_start AND ppi.ppi_end
LEFT JOIN PPI_SCORE_TOOKUP ppi2 ON e.PPI_SCORE BETWEEN ppi2.ppi_start AND ppi2.ppi_end
This matches your id's from the baseline table with the baseline_ID's from the endline table, keeping possible null values from baseline. It then matches the PPI_SCORE from baseline with ppi_start and ppi_end from PPI_SCORE_TOOKUP. Then we join the PPI_SCORE from endline with and ppi_end.
By replacing * with whatever fields you want to have.
See fiddle for a working example