TABLE_USER="""DROP TABLE IF EXISTS "c_user";CREATE TABLE c_user ( user_id varchar(1000) PRIMARY KEY, account varchar(20) NOT NULL, password varchar(50) NOT NULL);COMMENT ON COLUMN "c_user"."user_id" IS '用户id';COMMENT ON COLUMN "c_user"."account" IS '用户帐户';COMMENT ON COLUMN "c_user"."password" IS '用户密码';COMMENT ON TABLE "c_user" IS '用户表';"""