Question : what's problem of select statement with group?

what's problem of select statement with group?

select cb.com_id,cb.branch_address from customer_branch cb, customers c
where c.tid=cb.com_id(+)
group by cb.com_id

Thank you!
Francis SZE

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SQL> desc customers;
 Name                                      Null?    Type
 ----------------------------------------- -------- ----------------------------
 TID                                       NOT NULL NUMBER
 COM_NUM                                            VARCHAR2(4000)
 COM_NAME                                  NOT NULL VARCHAR2(4000)
 COM_ADDRESS                                        VARCHAR2(4000)
 COM_TEL                                            VARCHAR2(4000)
 COM_FAX                                            VARCHAR2(4000)
 COM_CONTACT                                        VARCHAR2(4000)
 COM_MOBILE                                         VARCHAR2(4000)
 COM_COUNTRY                                        VARCHAR2(4000)
 COM_BRANCH                                NOT NULL NVARCHAR2(1)
 COM_SALE_ID                                        NUMBER
 COM_TRANSPORT_ID                                   NUMBER
 COM_PAYMENT_DAY                           NOT NULL NUMBER
 COM_HEADER_NAME                                    VARCHAR2(4000)
 COM_DISABLED                              NOT NULL NVARCHAR2(2000)
 COM_BALANCE                               NOT NULL NUMBER(12,2)
 COM_AREA                                           VARCHAR2(255)

SQL> desc customer_branch
 Name                                      Null?    Type
 ----------------------------------------- -------- ----------------------------
 TID                                       NOT NULL NUMBER
 COM_ID                                    NOT NULL NUMBER
 BRANCH_ADDRESS                                     VARCHAR2(4000)
 BRANCH_CONTACT                                     VARCHAR2(4000)
 BRANCH_TEL                                         VARCHAR2(4000)
 BRANCH_FAX                                         VARCHAR2(4000)

Answer : what's problem of select statement with group?

try :

select cb.com_id,cb.branch_address from customer_branch cb, customers c
where c.tid=cb.com_id(+)
and com_id = 1

You do not need a group by for this.

Question : what's problem of select statement with group?

Answer : what's problem of select statement with group?

try :select cb.com_id,cb.branch_address from customer_branch cb, customers cwhere c.tid=cb.com_id(+)and com_id = 1You do not need a group by for this.

try :

select cb.com_id,cb.branch_address from customer_branch cb, customers c
where c.tid=cb.com_id(+)
and com_id = 1

You do not need a group by for this.