Why do we create views in sql?
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Let us suppose we have a table with structure in order empno empname empdesig empcountry and now i want to re-organize the columns of this table to empno empdesig empname empcountry how can i do this with queries ? assume that table contains the data.
What is 19 null in sql?
Is sqlite free?
Can we use more than one null value for unique key?
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