SQL Question
Code to fetch Data from 2 tables & enter in 3rd Table in php
Table1 - Payout Requests
`
|--------|-----------|-----------|
| id | Receiver | Balance |
|--------|-----------|-----------|
| 1 | user1 | 2000 |
|--------|-----------|-----------|
| 2 | user2 | 1500 |
|--------|-----------|-----------|`
Table2 - Donars
`
|--------|-----------|-----------|
| id | Donar | Amount |
|--------|-----------|-----------|
| 1 | love | 1500 |
|--------|-----------|-----------|
| 2 | don1 | 1000 |
|--------|-----------|-----------|`
Now my question; What piese of code will make Adjustments of both the tables so that data from these two tables goes in 3rd table in the following way
Table3 - Links
`
|--------|-----------|-----------|----------|
| id | Donar | Receiver | Amount |
|--------|-----------|-----------|----------|
| 1 | love | user1 | 1500 |
|--------|-----------|-----------|----------|
| 2 | don1 | user1 | 500 |
|--------|-----------|-----------|----------|
| 3 | don1 | user2 | 500 |
|--------|-----------|-----------|----------|`
AND now Table 1 & Table 2 will be Follows -
Table1 - Payout Requests
`
|--------|-----------|-----------|
| id | Receiver | Balance |
|--------|-----------|-----------|
| 2 | user2 | 1000 |
|--------|-----------|-----------|`
Table2 - Donars
`
|--------|-----------|-----------|
| id | Donar | Amount |
|--------|-----------|-----------|
| Nothing |
|--------|-----------|-----------|`
Answer
In the first step you should have a foreign key on Donars table which save id of Payout Requests. for example pr_id
You can use INNER JOIN like this:
SELECT `t2`.`id`, `t2`.`Donar`, `t1`.`Receiver `, `t1`.Balance - `t2`.`Amount` AS `Adjustment` FROM `table1` AS `t1` INNER JOIN `table2` AS `t2` ON `t2`.`pr_id` = `t1`.id
Source (Stackoverflow)