RANK() OVER : RANK « Aggregate Functions « SQL Server / T-SQL Tutorial

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SQL Server / T-SQL Tutorial » Aggregate Functions » RANK 
9. 6. 2. RANK() OVER
5create table department(
6>    dept_name     char(20)     not null,
7>    emp_cnt       int          not null,
8>    budget        float,
9>    date_month    datetime);
10> GO
1>
2insert into department values('Research', 550000'01.01.2002');
3insert into department values('Research', 1070000'01.02.2002');
4insert into department values('Research', 565000'01.07.2002');
5insert into department values('Accounting', 510000'01.07.2002');
6insert into department values('Accounting', 1040000'01.02.2002');
7insert into department values('Accounting', 630000'01.01.2002');
8insert into department values('Accounting', 640000'01.02.2003');
9insert into department values('Marketing', 610000'01.01.2003');
10insert into department values('Marketing', 1040000'01.02.2003');
11insert into department values('Marketing', 330000'01.07.2003');
12insert into department values('Marketing', 540000'01.01.2003');
13> GO

(rows affected)

(rows affected)

(rows affected)

(rows affected)

(rows affected)

(rows affected)

(rows affected)

(rows affected)

(rows affected)

(rows affected)

(rows affected)
1>
2SELECT RANK() OVER(ORDER BY budget DESCAS rank_budget,dept_name, emp_cnt, budget
3FROM department
4WHERE budget <= 50000;
5> GO
rank_budget          dept_name            emp_cnt     budget
-------------------- -------------------- ----------- ------------------------
                   Research                       5                    50000
                   Accounting                    10                    40000
                   Accounting                     6                    40000
                   Marketing                     10                    40000
                   Marketing                      5                    40000
                   Marketing                      3                    30000
                   Accounting                     6                    30000
                   Accounting                     5                    10000
                   Marketing                      6                    10000

(rows affected)
1> drop table department;
2> GO
1>
2>
3>
9. 6. RANK
9. 6. 1. The RANK() function preserves the ordinal position of the row in the list.
9. 6. 2. RANK() OVER
9. 6. 3. Returning Rows by Rank Without Gaps
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