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How to delete an existing column in a table?


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More MySQL Interview Questions

What is mysqlcommand?

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How much does mysql enterprise cost?

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What is the maximum length of a table name, database name, and fieldname in MySQL?

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Is SET Command is SQL Statement..?

4 Answers   BitWise,


A company wants to store their invoices in a database. They already have their customers and articles in that database. Both customer and article are each identified by an unique integer value. Please create the SQL statements for creating the necessary table(s) for storing the invoices in a MySQL database. An invoice should hold information like invoice number, customer, date, article(s) and quantity etc.

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Which is faster mongodb or mysql?

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SQL: 1. Write a queryto retrieve the author who was published a book at the youngest age? 2. write a query to retrieve the no. of books published a each year in various languages? 3. write a query to retrieve no. of books published by them only those authors who have published more than 1 book? 4. write a query to retrieve who has not published any books during the year 2006? 5. write a query to retrieve the authors who has published any books during the birth date write this query in 2 ways 1)joins 2)sub query 6. write a query to retrieve all the books which was published during jan 2007 & title containing India or published in the language hindi? 1. table name is liberary managemnt and two column is there one is authors and another one is books . 2.four fields will comes under authours like nationality, birthdate ,first-language,second-language 3.four fields will comes under books like authour,title ,language,publish date to write query using this details

4 Answers   Covansys,


How can we change the data type of a column of a table?

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What is the query to display top 20 rows?

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what is constraints?

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How do I rename a mysql database?

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What does the file with the extension: frm, myd, and myi contain?

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