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Data Handling and Research Methods:
The dataset encompassing 130 participants contains several variables measuring detrimental health related behaviours referring to the use of 'recreational' and illicit drugs e.g. caffeine, alcohol, heroin and ecstasy. The study utilises a broad theory- and research- based framework providing evidence for statistically significant relationships between the outlined 'drug consumption' and sensation seeking (some example refs: Golding, 1987, Zuckerman et al., 1990; Sher et. al. 2000, etc). Your main aim is to investigate potential predictors of weekly cigarette consumption You should consider all potential predictor variables but you are at liberty to select for more detailed consideration those variables which in your judgement are most useful predictors and/or of theoretical interest in this context. Please also ensure that the number of predictor variables used is sensible in terms of the ratio number of participants number of predictor variables. You should use multivariate techniques (e. g. multiple linear regression analysis) as appropriate at some stage in your analysis as well as provide simple descriptive statistics and correlations where relevant.
Explain entity integrity and referential integrity rules within relational model. Show how these are realized in SQL? Entity Integrity Rule - No primary key value could be nu
Describe the functions and features of foreign key? Foreign Key : The primary key of one file or table that is implanted in another file or table to implement the relationships
What is B-Tree? A B-tree eliminates the redundant storage of search-key values .It permits search key values to appear only once.
These permit the user to unload a database or parts of a database and reload the data on the similar machine, or on another machine in a dissimilar location. This can be useful in
Explain the two constraints, check and foreign key in SQL along with an example for each. Give the syntax. CHECK constraint - CHECK constraint specifies an expression which
Determine the steps of path in association network You can analyse use of paths in association network in the following steps: Examine every operation and see what asso
Create an index for the table Client, field CLIENT_NO of Q ? Command: CREATE INDEX client_client_no ON client(client_no);
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What is catalog in DBMS? Catalog - A relational DBMS maintains information about every table and index in which it contains. A catalog is a collection of special tables that st
1. Which model is used to store data in tree structures Ans: Hierarchical model is used to store data in tree structures
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