Answer Posted / sanjudharan
UNION : eliminates duplicates
UNION ALL: retains duplicates
Both these are used to combine the results of different
SELECT statements.
Suppose I have five SQL SELECT statements connected by
UNION/UNION ALL, how many times should I specify UNION to
eliminate the duplicate rows? -
Once.
| Is This Answer Correct ? | 22 Yes | 9 No |
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What is the latest version of ibm db2?
have 3 tables table1, table2 and table3 which contains employee information. table1 is master table, table2 contains emp details like emp no and so on, table 3 contains emp salary. so if any emp leave company between 25th - 30th of every month it has to get updated in tables. but it is not getting updated. What is the reason.
If anyone has IBM Certification Dumps pls forward to me & also let me know what are the Certification Codes that are available in DB2
