PL / SQL stands for Programming Language SQL. The PL / SQL is called extension of SQL and contains query statements and cursor control statements to enhance performance of SQL. SQL is the natural language of Oracle Engine.
It creates and maintains data manipulation objects such as tables, views, sequences etc.
DDL: It stands for Data Description Language used to create objects.
DML: It sta
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Friction is defined as the force that opposes the motion due to the contact of the moving bodies.Here are the objectives question related to the friction to solve and analyze your knowledge related to the friction.Answers are at the bottom of the worksheet.
1>The frictional force arises because of
(1) Interaction force between molecules of two bodies.
(2) Repulsive force between nuclei of two
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SQL (pronounced as “ess-queel”) is used to communicate with database. It is a standard language for RDBMS. So, it is used in Oracle, Sybase, Microsoft SQL Server, Ingress etc. It uses simple commands to work (with database). It is a declarative language which codes are interpreted by engine of DBMS.
It’s one statement is enough to query a lot of information but in the case of procedural
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Purification and Characterization of organic compound worksheet
Most of the organic substances when synthetically prepared or isolated from natural source are impure due to the presence of some bye-products or reactants. Before the compound can be analysed qualitatively or quantitatively, it is necessary that it should be in a pure state. Purification is not always easy and various methods dependi
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The collection, configuration, relation and day by day action on data are called database. The logical relationship among different data is database. The concept of database is essential for every field of computer science. In general sense, text is also a type of database of characters, symbols and numbers.
The animation is a database of frames, frames are database of colored pixels etc. The gove
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Molecular mass determination worksheet
The molecular mass (m) of a substance is the mass of one molecule of that substance, in unified atomic mass unit(s) u (equal to 1/12 the mass of one atom of the isotope carbon-12). This is numerically equivalent to the relative molecular mass (Mr) of a molecule, frequently referred to by the term molecular weight, which is the ratio of the mass of that molecu
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Organic Compounds Estimation Worksheet
Here, you can find some questions related to “Organic Compounds Estimation Worksheet” and their answers:
1. In organic compounds, sulphur is estimated as:
(a)
(b)
(c)
(d)
2. Percentage of hydrogen is maxium in:
(a)
(b)
(c)
(d)
3. Which liquids are taken in Schiff’s nitrometer in Duma
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Detection of elements Worksheet
It is a general test for the detection of halogens, nitrogen and sulphur in an organic compound. These elements are covalently bonded to the organic compounds. In order to detect them, these have to be converted into their ionic forms. This is done by fusing the organic compound with sodium metal. The ionic compounds formed during the fusion are extracted in aqueous
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Purification of organic compounds worksheet
Most of the organic substances when synthetically prepared or isolated from natural source are impure due to the presence of some bye-products or reactants. Before the compound can be analysed qualitatively or quantitatively, it is necessary that it should be in a pure state. Purification is not always easy and various methods depending upon the nature o
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Percentage and Molecular Formula
If we know the percentage composition of the elements in an organic compound we can find out its formula but formulae are of three types:
(a) Empirical or simple formula.
(b) Molecular formula.
(c) Structural formula.
Empirical formula
“The empirical formula of compound is the simplest formula deduced from its percentage composition showing
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