What are commit, rollback, and savepoint?
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How to disable a trigger name update_salary?
What is the usage of the distinct keyword?
Whis is not false in primary key?
Does varchar need length?
which will fire first ? Trigger or Constraint
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how to find 5th row ?
What is trigger in pl sql?
What is the difference between an inner and outer join?
Why schema is used in sql?
What are the different sql commands?
Explian rowid, rownum? What are the psoducolumns we have?
1 SELECT a.field1, b.field2, c.field3, d.field4 2 FROM atable a, atable b, ctable c, dtable d 3 ? 4 ORDER BY 1 What is the minimum number of joins that must be specified on line 3 in the sample code above to properly link the tables? Notice that the table "atable" is aliased twice: once as "a" and once as "b." 1. One join 2. Two joins 3. Three joins 4. Four joins 5. Five joins
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