Divide Result Set Into Groups Sql. In this way the result set returned by MySQL SELECT statement will be divided into groups. Smaller groups than 6 is allowed so I decide to divide 13 by 3 to accomplish the follwing division.
The NTILE analytic function allows you to break a result set into a specified number of approximately equal groups or buckets rows permitting. The NTILEN ranking window function is used to distribute the rows in the rows set into a specified number of groups providing each row in the row set with a unique group number starting with the number 1 that shows the group this row belongs to where N is a positive number which defines the number of groups you need to distribute the rows set into. SQL Structured Query Language sql To get a unified result set with the aggregated data for all grouping sets you can use the UNION ALL operator.
The GROUP BY Clause is used with the conjunction of the SQL SELECT query.
Because UNION ALL operator requires all result set to have the same number of columns you need to add NULL to the select list to the queries like this. I have to divide the rows equally so here for example there are 15 rows. The GROUP BY Clause is used with the conjunction of the SQL SELECT query. For example NTile 5 will divide a result set of 10 records into 5 groups with two records in each group.