sql - Join two query results where one is created from column values -

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i have table tables

table1:

name|starttime|endtime|project_number frank|   12:00|  16:00|project1 frank|   08:00|  16:00|project2 andre|   09:00|  16:00|project4 andre|   11:00|  16:00|project5

i try accomplish table shows time worked , each project this:

table2:

name |all|project1|project2|project3|project4 andre|12 |4       |8       |null    |null frank|12 |null    |null    |7       |5

i can result all

select name, sum(datediff(minute, starttime, endtime)) table1 group name, sum(datediff(minute, starttime, endtime))

and can accomplish table2 (with group on project well) not result want. tried union maps tables.

anyone can me done?

do datediff calculation in derived table. (to keep code pretty!)

then use case expressions conditional aggregation:

select name,        sum(ts),        sum(case when project_number = 'project1' ts end) project1,        sum(case when project_number = 'project2' ts end) project2,        sum(case when project_number = 'project3' ts end) project3,        sum(case when project_number = 'project4' ts end) project4 (     select name, datediff(minute, starttime, endtime) ts, project_number     table1 ) group name

you can skip derived table:

select name,        sum(datediff(minute, starttime, endtime)),        sum(case when project_number = 'project1' datediff(minute, starttime, endtime) end) project1,        sum(case when project_number = 'project2' datediff(minute, starttime, endtime) end) project2,        sum(case when project_number = 'project3' datediff(minute, starttime, endtime) end) project3,        sum(case when project_number = 'project4' datediff(minute, starttime, endtime) end) project4 table1 group name

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