Table: leveret_2nd_name
Columns: name
built_by_hm_dockyard
ordered
laid_down
launched

Question: Which built by HM Dockyard has September 1830 as the laid down?
SQL: SELECT "built_by_hm_dockyard" FROM leveret_2nd_name WHERE "laid_down" = 'september 1830'

Question: What is the name that has July 1823 as the Laid down, and portsmouth as the built by hm dockyard?
SQL: SELECT "name" FROM leveret_2nd_name WHERE "laid_down" = 'july 1823' AND "built_by_hm_dockyard" = 'portsmouth'

Question: What ordered has helena as the name?
SQL: SELECT "ordered" FROM leveret_2nd_name WHERE "name" = 'helena'

Question: What ordered has algerine (2nd of name) as the name?
SQL: SELECT "ordered" FROM leveret_2nd_name WHERE "name" = 'algerine (2nd of name)'

Question: What name has pembroke as the built by hm dockyard, and may 1825 as the laid down?
SQL: SELECT "name" FROM leveret_2nd_name WHERE "built_by_hm_dockyard" = 'pembroke' AND "laid_down" = 'may 1825'