Executive Business Development Question:
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Explain difference between union and group?
Answer:
The difference between union and group is as follows:
★ Take two tables t1 and t2.
★ In t1 we have columns like a,b,c,d. and t2 has a,d,e,f.
★ Ao union means t1 union t2 i.e getting result from both tables i.e a,b,c,d,e.,f
★ Where as group performs on a individual column in a particular table.
★ Take two tables t1 and t2.
★ In t1 we have columns like a,b,c,d. and t2 has a,d,e,f.
★ Ao union means t1 union t2 i.e getting result from both tables i.e a,b,c,d,e.,f
★ Where as group performs on a individual column in a particular table.
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