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  INSERT INTO StudAchieve(studID,studName)
  VALUES('2','abc'),('2','bcd'),('2','cde')

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SQL code:
INSERT INTO StudAchieve(studID,studName)
select '2','abc'
union all select '2','bcd'
union all select '2','cde'


SQL code:
INSERT INTO StudAchieve(studID,studName)
select '2' studID,'abc' studName union all
select '2','bcd' union all
select '2','cde'


INSERT INTO StudAchieve(studID,studName)
  VALUES('2','abc')

SQL code:
--try
INSERT
StudAchieve(studID,studName)
select
'2','abc'
union all
'2','bcd'
union all
'2','cde'


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INSERT INTO StudAchieve(studID,studName)
   VALUES('2','abc'),('2','bcd'),('2','cde')

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