Table: chinon_power_plant
Columns: unit
type
net_power
total_power
construction_start
construction_finish
commercial_operation
shut_down

Question: When did the construction of the unit Chinon B1 with net power of 905 MW start?
SQL: SELECT "construction_start" FROM chinon_power_plant WHERE "net_power" = '905 MW' AND "unit" = 'Chinon B1'

Question: What's the total power of the unit whose construction finished on 14.06.1963?
SQL: SELECT "total_power" FROM chinon_power_plant WHERE "construction_finish" = '14.06.1963'

Question: How many different values of total power are there for the unit whose construction started on 01.03.1977 and whose commercial operation started on 01.02.1984?
SQL: SELECT COUNT("total_power") FROM chinon_power_plant WHERE "construction_start" = '01.03.1977' AND "commercial_operation" = '01.02.1984'

Question: What's the shut down state of the unit that's been in commercial operation since 01.02.1984?
SQL: SELECT "shut_down" FROM chinon_power_plant WHERE "commercial_operation" = '01.02.1984'

Question: When was the start of the construction of the unit that's been in commercial operation since 04.03.1987?
SQL: SELECT "construction_start" FROM chinon_power_plant WHERE "commercial_operation" = '04.03.1987'