the order of a SQL Query execution1. FROM 2. ON 3. OUTER 4. WHERE 5. GROUP BY 6. CUBE or ROLLUP 7. HAVING 8. SELECT 9. DISTINCT 10. ORDER BY 11. TOP
1) from 2) on 3) Join 4) where 5) Group by 6) Having 7) select 8) Distinct 9) Order by 10) Top
1.FROM 2.ON 3.JOIN 4.WHERE 5.GROUP BY 6.WITH CUBE or WITH ROLLUP 7.HAVING 8.SELECT 9.DISTINCT 10.ORDER BY 1.TOP
"SQL has no order of execution. Is a declarative language. The optimizer is free to choose any order it feels appropriate to produce the best execution time. Given any SQL query, is basically impossible to anybody to pretend it knows the execution order.
The order of a SQL Query execution as per below : 1. FROM 2. ON 3. OUTER 4. WHERE 5. GROUP BY 6. CUBE or ROLLUP 7. HAVING 8. SELECT 9. DISTINCT 10. ORDER BY 11. TOP
Hi ,Order clause is used to sort the data in descending order and ascending order . Here is syntax: SELECT column-list FROM table_name [WHERE condition] [ORDER BY column1, column2, .. columnN] [ASC | DESC];
FROMONJOINWHEREGROUP BYWITH CUBE or WITH ROLLUPHAVINGSELECTDISTINCTORDER BYTOP
FROM ON JOIN WHERE GROUP BY WITH CUBE or WITH ROLLUP HAVING SELECT DISTINCT ORDER BY TOP
We use SELECT statement to retrieve data from SQL. Generally we type T-SQL clauses in below order: SELECT FROM WHERE GROUP BY HAVING ORDER BY But the logical query processing order is different. FROM WHERE GROUP BY HAVING SELECT ORDER BY For example - If we want return all employees from deptno 30. SELECT ename,sal FROM emp WHERE deptno=30 ORDER BY ename When it goes to SQL, it executes as below FROM emp WHERE deptno=30 SELECT ename,sal ORDER BY ename Each execution phase operates on one or more tables (if JOIN involved) as inputs and returns a virtual table as output. The output table of one phase is considered the input to the next phase.