questions i got wrong Flashcards
(30 cards)
w2: sdlc DETAILED CONCEPTUAL MODEL
ANALYSIS
w2:sdlc data DEFINED categoruuy LISTED …
ANALYSIS
w2: consensus on dataa def
org conflict
w2: primary puruses of dbms EXCPET
int dev env
good data def will describe all characeritsts EXCEPT
DELETE THE DATA
entity type name should be everything except
AS SHORT AS POSSIBLE
a___ def or constarints business aspect
BUSIENESS RULE
the __ no PK MAY BE NULL
tntity integrity
func dependnacy 2 oor more non key
TRANSITIVE DEPENDANCY
entity integrity is a rule that
no NULL
Domain def consists of all excet
INTEGRITY CONSTRAINTS
WHICH of follow clauses finds all groups meeting stated condiitons
HAVING
A view may not be directly updated if it contains
HAVING
last part of sql query to be read
ORDER BY
single val return form sql
scalar agg
SCALAR = SINGLE
multi value return
vector agg
to get all cust from hawaii sorted together?
ORDER BY
Which of the following counts only row that contain vlaue
COUNT
all multival removed: 1ST
no multival attributed + nonkey dep on pk: 2ND
normal form removes remaiing func de: BOYCODD
WHAT PRODUCES SCALAR AND VECTOR AGG
GROUP BY
What does the following SQL statement do?
DELETE FROM Customer_T
WHERE state = ‘HI’;
Deletes all records from Customer_t where the state is equal to HI
SELECT MIN(Product_Description)
FROM Product_V;
FIRST VALAUE OF PRODUCT DECSIRPTION WILL BE SHOWN
INSERT INTO is an example of ________ code.
DML
__ set of commands to CONTROL db
__ set of commands to UPDATE and Query a db
DCL
DML