CREATE TABLE "CMMSG" ("PK_ID" VARCHAR2(50) NOT NULL, "USER_NAME" VARCHAR2(50) NOT NULL, "READ_FLAG" NUMBER(1,0) DEFAULT 0 NOT NULL,READ_DATE DATE NULL, "SENDER" VARCHAR2(50) NULL,SEND_DATE DATE NULL, "MSG" VARCHAR2(255) NOT NULL) ;
ALTER TABLE "CMMSG" ADD ( CONSTRAINT cmmsg_pk PRIMARY KEY ( "PK_ID", "USER_NAME" )) ;  