@@ -1506,3 +1506,54 @@ WHERE store3 IS NOT NULL
15061506---
15071507
15081508** [ ⬆ Back to Top] ( #sql-coding-challenges-for-beginners ) **
1509+ 1510+ ## 45. Find the Team Size
1511+ 1512+ Write a SQL query to find the team size of each of the employees. Return result table in any order. Here is an example:
1513+ 1514+ ```
1515+ Employee Table:
1516+ +-------------+------------+
1517+ | employee_id | team_id |
1518+ +-------------+------------+
1519+ | 1 | 8 |
1520+ | 2 | 8 |
1521+ | 3 | 8 |
1522+ | 4 | 7 |
1523+ | 5 | 9 |
1524+ | 6 | 9 |
1525+ +-------------+------------+
1526+ ```
1527+ 1528+ ```
1529+ Result table:
1530+ +-------------+------------+
1531+ | employee_id | team_size |
1532+ +-------------+------------+
1533+ | 1 | 3 |
1534+ | 2 | 3 |
1535+ | 3 | 3 |
1536+ | 4 | 1 |
1537+ | 5 | 2 |
1538+ | 6 | 2 |
1539+ +-------------+------------+
1540+ ```
1541+ 1542+ <details ><summary >Solution</summary >
1543+ 1544+ ``` sql
1545+ SELECT employee .employee_id , team .team_size
1546+ FROM employee
1547+ LEFT JOIN (
1548+ SELECT team_id, COUNT (employee_id) AS team_size
1549+ FROM employee
1550+ GROUP BY team_id
1551+ ) team
1552+ ON employee .team_id = team .team_id ;
1553+ ```
1554+ 1555+ </details >
1556+ 1557+ ---
1558+ 1559+ ** [ ⬆ Back to Top] ( #sql-coding-challenges-for-beginners ) **
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