Make the query tree for the following query (assume the database of pr

Question

Make the query tree for the following query (assume the database of problem 2(d)).

SELECT c.custName, c. custId, a.AccountNumber, t.DebitORCredit
FROM Customer c, Account a, Transaction t
WHERE c.custId = a.custId AND a.AccountNumber = t.AccountNumber
AND Amount > 10000;

13 Sep 2024

Answer :

Word Count : 564

To construct a query tree for the given SQL query, we need to break down the query into its basic components and represent them as a hierarchical structure. Here's a detailed breakdown of the query and its corresponding query tree:

### Query Breakdown

The SQL query provided is:

```sql
SELECT c.custName, c.custId, a.AccountNumber, t.DebitORCredit
FROM Customer c, Account a, Transaction t
WHERE c.custId = a.custId
AND a.AccountNumber = t.AccountNumber
AND Amount > 10000;
```

#### 1. Join Operations

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Transaction A	Transaction B	Transaction C
Read X	Read X	Read X
Read Y	ADD 500	SUBTRACT 200
Raed Z	W r i t X	WRITE X
	Read Y
	SUBTRACT 500
	W r i t e Y