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Oracle Database Interview Question:
How To Revise and Re-Run the Last SQL Command?
Submitted by: AdministratorIf executed a long SQL statement, found a mistake in the statement, and you don't want enter that long statement again, you can use the input buffer commands to the correct last statement and re-run it. The following tutorial exercise gives you a good example:
SQL> connect HR/retneclgg
SQL> SELECT FIRST_NAME, LAST_NAME, HIRE_DATE
2 FROM EMPLOYEE WHERE FIRST_NAME LIKE 'Joh%';
FROM EMPLOYEE WHERE FIRST_NAME LIKE 'Joh%'
*
ERROR at line 2:
ORA-00942: table or view does not exist
SQL> LIST
1 SELECT FIRST_NAME, LAST_NAME, HIRE_DATE
2* FROM EMPLOYEES WHERE FIRST_NAME LIKE 'Joh%'
SQL> CHANGE /EMPLOYEE/EMPLOYEES/
2* FROM EMPLOYEES WHERE FIRST_NAME LIKE 'Joh%'
SQL> RUN
(Query output)
SQL> INPUT ORDER BY FIRE_DATE
SQL> LIST
1 SELECT FIRST_NAME, LAST_NAME, HIRE_DATE
2 FROM EMPLOYEE WHERE FIRST_NAME LIKE 'Joh%'
3* ORDER BY HIRE_DATE
SQL> RUN
(Query output)
SQL> CLEAR BUFFER
buffer cleared
SQL> LIST
SP2-0223: No lines in SQL buffer.
Submitted by: Administrator
SQL> connect HR/retneclgg
SQL> SELECT FIRST_NAME, LAST_NAME, HIRE_DATE
2 FROM EMPLOYEE WHERE FIRST_NAME LIKE 'Joh%';
FROM EMPLOYEE WHERE FIRST_NAME LIKE 'Joh%'
*
ERROR at line 2:
ORA-00942: table or view does not exist
SQL> LIST
1 SELECT FIRST_NAME, LAST_NAME, HIRE_DATE
2* FROM EMPLOYEES WHERE FIRST_NAME LIKE 'Joh%'
SQL> CHANGE /EMPLOYEE/EMPLOYEES/
2* FROM EMPLOYEES WHERE FIRST_NAME LIKE 'Joh%'
SQL> RUN
(Query output)
SQL> INPUT ORDER BY FIRE_DATE
SQL> LIST
1 SELECT FIRST_NAME, LAST_NAME, HIRE_DATE
2 FROM EMPLOYEE WHERE FIRST_NAME LIKE 'Joh%'
3* ORDER BY HIRE_DATE
SQL> RUN
(Query output)
SQL> CLEAR BUFFER
buffer cleared
SQL> LIST
SP2-0223: No lines in SQL buffer.
Submitted by: Administrator
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