How exception handling is done in advance pl/sql?
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what are the advantages of package?
What is dense_rank?
Create table emp (id number(9), name varchar2(20),salary number(9,2)); The table has 100 records after table created.Now i nee to change id's Datatype is to be Varchar2(15). now Alter table emp modify(id varchar2(15),name varchar2(20), salary number(9,2)); Whether it will work or returns error? post answer with explanation.
What is an Exception ? What are types of Exception ?
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Mention what problem one might face while writing log information to a data-base table in pl/sql?
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Can we use having without group by in sql?
How much ram can sql express use?
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