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1 Why do some people pronounce SQL as "sequel" 2 Why are the manipulation statements of SQL more widely used than the definition and control statements 3 How many levels do the SQL-92, SQL: 1999, and SQL:2003 standards have 4 Why is conformance testing important for the SQL standard 5 In general, what is the state of conformance among major DBMS vendors for the SQL:2003 standard 6 What is stand-alone SQL 7 What is embedded SQL 8 What is an expression in the context of database languages 9 From the examples and the discussion in 4, what parts of the SELECT statement are not supported by all DBMSs
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Recite the rule about the GROUP BY and HAVING clauses Recite the rule about columns in SELECT when a GROUP BY clause is used How does a row condition differ from a group condition Why should row conditions be placed in the WHERE clause rather than the HAVING clause Why are most DBMSs not case sensitive when matching on string conditions Explain how working with sample tables can provide insight about difficult problems When working with date columns, why is it necessary to refer to documentation of your DBMS How do exact and inexact matching differ in SQL How do you know when the output of a query relates to groups of rows as opposed to individual rows What tables belong in the FROM statement Explain the cross product style for join operations Explain the join operator style for join operations Discuss the pros and cons of the cross product versus the join operator styles Do you need to know both the cross product and the join operator styles What is a self-join When is a self-join useful Provide a SELECT statement example in which a table is needed even though the table does not provide conditions to test or columns to show in the result What is the requirement when using the traditional set operators in a SELECT statement When combining joins and grouping, what conceptually occurs first, joins or grouping How many times does grouping occur in a SELECT statement Why is the SELECT statement more widely used than the modification statements INSERT, UPDATE, and DELETE Provide an example of an INSERT statement that can insert multiple rows What is the relationship between the DELETE statement and the rules about deleting referenced rows What is the relationship between the UPDATE statement and the rules about updating the pri mary key of referenced rows How does COUNT(*) differ from COUNT(ColumnName) How does COUNT(DISTINCT ColumnName) differ from COUNT(ColumnName) When mixing AND and OR in a logical expression, why is it a good idea to use parentheses What are the most important lessons about the conceptual evaluation process What are the mental steps involved in query formulation What kind of join queries often have duplicates in the result What mental steps in the query formulation process are addressed by the conceptual evaluation process and critical questions
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The problems use the tables of the Order Entry database, an extension of the order entry tables used in the problems of 3 Table 4P1 lists the meaning of each table and Figure 4PI shows the Access Relationship window After the relationship diagram, row listings and Oracle CREATE TABLE statements are shown for each table In addition to the other documentation, here are some notes about the Order Entry Database: The primary key of the OrdLine table is a combination of OrdNo and ProdNo The Employee table has a self-referencing (unary) relationship to itself through the foreign key, SupEmpNo, the employee number of the supervising employee In the relationship diagram, the table Employee_l is a representation of the self-referencing relationship, not a real table The relationship from OrderTbl to OrdLine cascades deletions and primary key updates of refer enced rows All other relationships restrict deletions and primary key updates of referenced rows if related rows exist
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