User need to combine 3 SQL queries and make one Pivot statement to fulfill the business requirement. Step 3 :Use of Inline view to fetch job titles, Step 2 : Use pivot statement to fetch maximum of salaries with using statement in Step 1. The above query will give you information about department with its salary. I would like to explain this query step-by-step, The above statement will give you the maximum as well as minimum salary for the employees. Scenario : We need to check out the maximum as well as minimum salary for the employees department wise. The syntax is same but the example is bit complex, You can use the SQL Pivot statement to transpose multiple columns. In this section we can check one example of SQL Pivot Multiple columns in details. So the much better way is to use pivot statement.
We need to write PL SQL statement to transpose the values. There are two reasons of using pivot,ġ.The performance with pivot statements much better that group by clause.Ģ.You can count the department count with count and group by statement but the question is to transpose it. Here everyone have to have question in mind that if you can count the number of departments by group by clause why to use pivot. The above query will give us the number of departments falls in employee table and number of assigned departments for employees. We are selecting and counting the department _name in this query.The first query will select the department name and second query counts it using Count aggregate function. With the above query we will get to know following things , The Oracle 11G and above version do have this functionality. This is used in reporting and creating interactive reports. The Pivot is used to transpose the rows into columns. In this section I will try to explain the example of Pivot statement. If you are using the subquery in pivoting we can use that result of subquery to determine the values for column_to_Pivot2 to Pivot into headings in cross table query results. We need to use this instead of list of values. The list of values of column_to_Pivot2 are used to pivot the values in to headings which gives us the cross tabulation results. The examples of aggregation functions are SUM ,Count,Max,Min,Avg like functions which has only 1 output and multiple inputs. The aggregate functions are nothing but the functions which are specifically used for aggregation purpose. In this section I would like to explain the syntax of Pivot statement. ORDER BY expression Syntax Explaination : IN (expression1,expression2….expression’N’) Or subquery
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