Interview Answer

There are two ways of constructing a software design: One way is to make it so simple that there are obviously no deficiencies, and the other way is to make it so complicated that there are no obvious deficiencies. The first method is far more difficult. C.A.R. Hoare

Write a SQL query to find the last record inserted in the table

January 1, 1970 12:00 am

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Write a SQL query to find the last record inserted in the table


The employee table contains the following fields

													Name           Null     Type         
													-------------- -------- ------------ 
													EMPLOYEE_ID    NOT NULL NUMBER(6)    
													FIRST_NAME              VARCHAR2(20) 
													LAST_NAME      NOT NULL VARCHAR2(25) 
													EMAIL          NOT NULL VARCHAR2(25) 
													PHONE_NUMBER            VARCHAR2(20) 
													HIRE_DATE      NOT NULL DATE         
													JOB_ID         NOT NULL VARCHAR2(10) 
													SALARY                  NUMBER(8,2)  
													COMMISSION_PCT          NUMBER(2,2)  
													MANAGER_ID              NUMBER(6)    
													DEPARTMENT_ID           NUMBER(4)   
													

The select query return the following results ( more data. We filtered the data)

													100	Steven	King	SKING	515.123.4567	17-JUN-03	AD_PRES	24000			90
													101	Neena	Kochhar	NKOCHHAR	515.123.4568	21-SEP-05	AD_VP	17000		100	90
													102	Lex	De Haan	LDEHAAN	515.123.4569	13-JAN-01	AD_VP	17000		100	90
													103	Alexander	Hunold	AHUNOLD	590.423.4567	03-JAN-06	IT_PROG	9000		102	60
													104	Bruce	Ernst	BERNST	590.423.4568	21-MAY-07	IT_PROG	6000		103	60
													

Solution

   					 Select * from (select * from HR.employees order by rownum desc) where rownum<2;				    

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