INTERVIEW QUESTIONS DATABASE SQL DETAILS

Question: When we give SELECT * FROM EMP; How does oracle respond:

Answer: When u give SELECT * FROM EMP;

the server check all the data in the EMP file and it displays the data of the EMP file

When u give SELECT * FROM EMP;

the server check all the data in the EMP file and it displays the data of the EMP file
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when we give select * from emp it will shows the records of table emp if the table contain records. If it hasn't any records then it will shows no rows selected.
Source: CoolInterview.com

The database adds one more column ROWNUM and ROWID but displays ROWNUM with SELECT statement. Source: CoolInterview.com

when we give select*from emp then it will shows full data in emp table after it shows what we asking the particular record. Source: CoolInterview.com

when we select the select * emp the particular table values are displayed and the background parsing is generated.. Source: CoolInterview.com

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