Join relations

Join relations – The concept of a joined table (or joined relation) was incorporated to permit users to specify a table resulting from a join operation in the FORM clause of a query. In addition to providing the basic Cartisean product mechanism for joining tuples of relations provided by the earlier versions of SQL. SQL- 92 …

Make money from internet

Hello Friends Today I’m going to tell you about such information about which everyone may want to know maybe you too. You all know that many things are going on in the internet today, like seeing online results, make online shopping, mobile recharge, dish recharge or online bills etc. All the work is going online …

Perfect black body

Perfect black body is one which absorbs heat radiation of all wavelengths, which falls on it. Such a body neither reflects nor transmits any part of the incident heat radiation and hence appears black irrespective of the color of incident radiation. Obviously, the absorbance of a perfect black body. A perfect black body when heated …