CREATE TABLE table_1500146_1 (rhel_release_date VARCHAR, scientific_linux_release VARCHAR)

When is the rhel release date when scientific linux release is 3.0.4
SELECT rhel_release_date FROM table_1500146_1 WHERE scientific_linux_release = "3.0.4"
SELECT "rhel_release_date" FROM "table_1500146_1" WHERE "3.0.4" = "scientific_linux_release"