INSERT INTO system_config (config_key, config_value, config_type, description, is_system)
VALUES (#{configKey}, #{configValue}, #{configType}, #{description}, #{isSystem})
UPDATE system_config
SET config_value = #{configValue},
config_type = #{configType},
description = #{description},
is_system = #{isSystem}
WHERE id = #{id}
DELETE FROM system_config WHERE id = #{id}
DELETE FROM system_config WHERE config_key = #{configKey}