Questions

The 828-metre (2,717 ft) tall Burj Khalifa in Dubai has been the tallest building since 2008.

A primary key is a special relational database table column or combination of columns designated to uniquely identify all table records. That is, A primary key is a column or set of columns in a table that uniquely identifies tuples (rows) in that table.

A primary key, also called a Primary Keyword.

Main Features Primary key are ::

It must contain a unique value for each row of data.

It cannot contain null values.

The ancient goal of astrology was to predict human events.

The Quality Factor is also defined, as Q. So it is a number, which reflects the lossness of a circuit. higher the Q, the lower are the losses.

the quality factor is measurement of efficiency (or effectiveness) of a device or circuitry. In literal sense quality factor means qualitative performance of a device.

British businessman Mark Tucker, currently group chief executive and president of insurance group AIA, will take over from Douglas Flint as the new Chairman of HSBC in October.