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What are the types of keys?
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explain commit and rollback in mysql : sql dba
have table with two columns with datatypes as number and varchar and the values in A column like 1,2,3 AND B column values like a,b,c. now need to display data in a single column as 1,a,2,b,3,c.
What is nvl?
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What is the main difference between sql and pl/sql?
type type_name is table of varchar2(30) index by binary_integer for the above type you have to create a identifier... like identifier_name type_name; for the above type you can use the below methods..like first , last , prior, next , delege..etc...like this.. if you create a cursor...like cursor cursor_name is select * from scott.emp; is there any methods like above to use prior, fist , last , next , trim ,etc...
How do I find duplicates in a single column in sql?
why use cursors?
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What is the purpose of the partition table?
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