What gives rise to null values in a relation? (Please give full explanation.)
What gives rise to null values in a relation?
(Please give full explanation.)
Homework Answers
When a value of a certain field is unknown, it is said to have a NULL value i.e. the ability to have any value at all. It is different from a blank or 0. A blank is used when a column value is not applicable for that particular relation. For eg: Consider a table Suppliers containing columns like Supplier Id, Name, Phone no, Fax no. etc. Suppose for a particular supplier you do not know the fax no. , then it will be filled with a NULL but if the supplier does not have a fax no, it will be left blank.0 is treated as an INT or DECIMAL value. Database engines have to provide support for NULL values , irrespective of the column data type, as different from 0, blank spaces or N/A.
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What gives rise to null values in a relation?
(Please give full explanation.)
Please give detailed explanation of the following equation in relation to heat transfer in liquids. In...
Please give detailed explanation of the following equation in
relation to heat transfer in liquids. In you detailed explanation
please state the meaning of the terms used.
Equations Governing Heat Transfer in Liquid For a moving fluid the following considerations are necessary when formulating the heat equation • When a fluid moves it transports energy. • Viscosity is temperature dependent. • Density is temperature dependent. From the above contribution the equation governing temperature distribution in a moving fluid is given...
Please give the full explanation of the question and the details of solution 6. An example...
Please give the full explanation of the question and the
details of solution
6. An example of a nonsense mutation in the GAG codon that encodes the amino acid glutamine is A) TAG B) TAA CO GGG D) GAA. E) AAG
Please give a full explanation. I am super confused given a history graph and drawing a...
Please give a full explanation. I am super confused given a
history graph and drawing a snapshot graph.
Please use retrosynthetic analysis to determine the substrate that gives rise to the following products with...
Please use retrosynthetic analysis to determine the substrate that gives rise to the following products with the reagents used. If there is no possible substrate, please state so and briefly explain why there is no substrate that will give rise to the reaction. Nacht ОН ہ OH 1) LAH Ý 2) H₂O 11. Hint: This is an intramolecular grignard reaction Ý Please listen to the short lecture on Naming Carbonyl Containing compounds before attempting this next section. Once you are...
Please give a full explanation! do a that is morted 3.5x 1o lnes per m Calcolak...
Please give a full explanation!
do a that is morted 3.5x 1o lnes per m Calcolak tie percentage uncertat in the numberイ【ines permetre ng @loche g↓ved fJA explanatimち
please give examples and be specific. (1) Discuss the significance of bootstrap values in relation to statistics. (2) Discuss the relationship between bioinformatics and statistics.
please give examples and be specific. (1) Discuss the significance of bootstrap values in relation to statistics. (2) Discuss the relationship between bioinformatics and statistics.
what structure gives rise to the umbilical blood vessels?
what structure gives rise to the umbilical blood vessels?
Please answer all :) 1. The [v] includes somites, which give rise to [w). The ectoderm...
Please answer all
:)
1. The [v] includes somites, which give rise to [w). The ectoderm includes the [x), which gives rise to the lyl. The [z] gives rise to the gut. Answer Choices: endoderm mesoderm muscles . ectoderm brain and spinal cord e gut neural tube . somites . notochord Which of the following land plant characteristics are NOT found in green algae? MULTIPLE ANSWERS CAN BE SELECTED 2. a. embryo retention b. cell walls made of cellulose c....
** Please with full steps and explanation ** You are given the following results of a...
** Please with full steps and explanation **
You are given the following results of a paired-difference test: a = -4.6 Sa = 0.25 n = 16 Construct a 90% confidence interval estimate for the paired difference in mean values.
Show formally that the following relation is correct. Give the values of constants c and n0....
Show formally that the following relation is correct. Give the
values of constants c and n0.
n2logn = (n2+100)
Please give detailed explanation of the following equation in
relation to heat transfer in liquids. In you detailed explanation
please state the meaning of the terms used.
Equations Governing Heat Transfer in Liquid For a moving fluid the following considerations are necessary when formulating the heat equation • When a fluid moves it transports energy. • Viscosity is temperature dependent. • Density is temperature dependent. From the above contribution the equation governing temperature distribution in a moving fluid is given...
Please give the full explanation of the question and the
details of solution
6. An example of a nonsense mutation in the GAG codon that encodes the amino acid glutamine is A) TAG B) TAA CO GGG D) GAA. E) AAG
Please give a full explanation. I am super confused given a
history graph and drawing a snapshot graph.
Please use retrosynthetic analysis to determine the substrate that gives rise to the following products with the reagents used. If there is no possible substrate, please state so and briefly explain why there is no substrate that will give rise to the reaction. Nacht ОН ہ OH 1) LAH Ý 2) H₂O 11. Hint: This is an intramolecular grignard reaction Ý Please listen to the short lecture on Naming Carbonyl Containing compounds before attempting this next section. Once you are...
Please give a full explanation!
do a that is morted 3.5x 1o lnes per m Calcolak tie percentage uncertat in the numberイ【ines permetre ng @loche g↓ved fJA explanatimち
Please answer all
:)
1. The [v] includes somites, which give rise to [w). The ectoderm includes the [x), which gives rise to the lyl. The [z] gives rise to the gut. Answer Choices: endoderm mesoderm muscles . ectoderm brain and spinal cord e gut neural tube . somites . notochord Which of the following land plant characteristics are NOT found in green algae? MULTIPLE ANSWERS CAN BE SELECTED 2. a. embryo retention b. cell walls made of cellulose c....
** Please with full steps and explanation **
You are given the following results of a paired-difference test: a = -4.6 Sa = 0.25 n = 16 Construct a 90% confidence interval estimate for the paired difference in mean values.
Show formally that the following relation is correct. Give the
values of constants c and n0.
n2logn = (n2+100)
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