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Exploring why column headers are absent
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| SQL> DESC customer; | |
| Name Null? Type | |
| ------------ -------- ------------ | |
| CUST_ID NOT NULL NUMBER(5) | |
| CUST_NAME VARCHAR2(15) | |
| ACCOUNT_ID VARCHAR2(10) | |
| ACCOUNT_TYPE VARCHAR2(2) | |
| STATE VARCHAR2(2) | |
| SQL> SELECT cust_id, cust_name, account_id, account_type, state FROM customer; | |
| 90001 B and B A-11101 PR AK | |
| 90002 XYZ A-11102 CM NJ | |
| 90003 JJ Sons A-11103 CM NJ | |
| 90004 Exxon A-11104 PR NY | |
| 90005 ABC A-11105 CM NY | |
| 90006 Smith Co. A-11106 CM MD | |
| 90007 Brown Co. A-11107 CM MD | |
| 90008 Cooper Inc. A-11108 PR MD | |
| 8 rows selected. | |
| SQL> DESC customer; | |
| Name Null? Type | |
| ------------ -------- ------------ | |
| CUST_ID NOT NULL NUMBER(5) | |
| CUST_NAME VARCHAR2(15) | |
| ACCOUNT_ID VARCHAR2(10) | |
| ACCOUNT_TYPE VARCHAR2(2) | |
| STATE VARCHAR2(2) | |
| SQL> SELECT * FROM customer; | |
| 90001 B and B A-11101 PR AK | |
| 90002 XYZ A-11102 CM NJ | |
| 90003 JJ Sons A-11103 CM NJ | |
| 90004 Exxon A-11104 PR NY | |
| 90005 ABC A-11105 CM NY | |
| 90006 Smith Co. A-11106 CM MD | |
| 90007 Brown Co. A-11107 CM MD | |
| 90008 Cooper Inc. A-11108 PR MD | |
| 8 rows selected. |
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