What are the types of triggers ?
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Answer / vijay
12 types of trigger
SATEMENT LEVEL TRIGGER
1.before insert
2.before update
3.before delete
4.after insert
5.after update
6.after delete
ROW LEVEL TRIGGER
7.before insert
8.before update
9.before delete
10.after insert
11.after update
12.after delete
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Answer / ismail
Trigger are 3 types.
1. DML trigger
2. Instead-of trigger
3. System trigger
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Answer / shobh raj
there are mainly five types of triggers
1 DDL trigger
2 DML trigger
3 instead of trigger
4 system event
5 user event
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Answer / manoj kumar jena
Triggers are broadly 5types in datadase.
1.Row level trigger
2.Statement level Trigger
3.Before trigger
4.After Trigger
5.Instead Trigger
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Answer / pranee
four types of triggers generally
row level triggers
statement level triggers
after triggers
before triggers
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Answer / chakri
row and statement trigger
before and ofter trigger
instead off trigger
system event and user event trigger
| Is This Answer Correct ? | 0 Yes | 1 No |
SELECT emp_num, years, SUM(salary) FROM sales UNION ALL SELECT emp_id, SUM(takehomepay) FROM marketing What error is present in the sample code above? 1. Queries being combined with the UNION ALL statement are not allowed to have SELECT lists with a different number of expressions. 2. You are not allowed to use aggregate functions within two queries joined by a UNION ALL statement. 3. The UNION ALL statement incorrectly combines the "years" result from the first query with the "SUM (takehomepay)" result from the second query. 4. Unless the UNION ALL statement is replaced with a UNION statement, the queries will return duplicates. 5. The "emp_id" column from the second query must be renamed (or aliased) as "emp_num" so that it corresponds to the column name from the first query. Otherwise, the queries will not execute.
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