Database: california_schools
Question: What is the ratio of merged Unified School District schools in Orange County to merged Elementary School District schools?
SQL: SELECT CAST(SUM(CASE WHEN DOC = 54 THEN 1 ELSE 0 END) AS REAL) / SUM(CASE WHEN DOC = 52 THEN 1 ELSE 0 END) FROM schools WHERE StatusType = 'Merged' AND County = 'Orange'