Postgres SQL tables, with table define:
CREATE TABLE frpm\n(\nCDSCode TEXT  primary key,\n`Academic Year` TEXT,\n`County Code` TEXT,\n`District Code` INTEGER ,\n`School Code` TEXT,\n`County Name` TEXT ,\n`District Name` TEXT ,\n`School Name` TEXT ,\n`District Type` TEXT ,\n`School Type` TEXT ,\n`Educational Option Type` TEXT ,\n`NSLP Provision Status` TEXT ,\n`Charter School (Y/N)`INTEGER,\n`Charter School Number` TEXT,\n`Charter Funding Type`TEXT ,\nIRC INTEGER,\n`Low Grade` TEXT,\n`High Grade`TEXT ,\n`Enrollment (K-12)` REAL,\n`Free Meal Count (K-12)`REAL ,\n`Percent (%) Eligible Free (K-12)`REAL ,\n`FRPM Count (K-12)` REAL ,\n`Percent (%) Eligible FRPM (K-12)`REAL ,\n`Enrollment (Ages 5-17)`REAL ,\n`Free Meal Count (Ages 5-17)` REAL ,\n`Percent (%) Eligible Free (Ages 5-17)` REAL ,\n`FRPM Count (Ages 5-17)`REAL ,\n`Percent (%) Eligible FRPM (Ages 5-17)` REAL ,\n`2013-14 CALPADS Fall 1 Certification Status` INTEGER,\nforeign key (CDSCode) references schools (CDSCode)\n)\n\n
--External Knowledge: Eligible free rate for K-12 = `FRPM Count (K-12)` / `Enrollment (K-12)`\n
--Using valid SQLite and understading External Knowledge, answer the following questions for the tables provided above.\n
--What is the highest eligible free rate for K-12 students in the schools in Alameda County?\n
SELECT