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ISDS 402 Final Exam questions well answered to pass
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ISDS 402 Final Exam questions well answered to pass
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ISDS 402 Final ExamDDL - correct answer ✔✔Data Definition Language
CREATE, ALTER, DROP
DML - correct answer ✔✔Data manipulation language refers to the four basic operations that can and
must be performed on data stored in any DBMS: data retrieval, data update, insertion of new records,
and deletion of existing records.
When you drop a table in SQL - correct answer ✔✔you also drop all of its data
when removing tables always start with - correct answer ✔✔many side, due to referential integrity
SQL ALTER TABLE statement - correct answer ✔✔The SQL command used to change the structure of a
database table
-DDL
Uses of DML - correct answer ✔✔query database and modify data in the tables
Method 1 of inserting data - correct answer ✔✔Use both names and values of columns
Method 2 of inserting data - correct answer ✔✔use only columns values but not column names
SELECT clause - correct answer ✔✔specifies which columns are to be listed in the query results
FROM clause - correct answer ✔✔Specifies the table containing the column listed in the select clause
WHERE clause - correct answer ✔✔specifies which rows are to be listed in the query results
, symbol for all - correct answer ✔✔* star
SELECT DISTINCT - correct answer ✔✔specifies that the statement is going to be a query that returns
unique values in the specified column(s).
ORDER BY clause - correct answer ✔✔- It simply takes the result of a SQL query and orders them by one
or more specified attributes.
- automatically orders by ASC, can specify DESC
3 options for SQL WHERE clause - correct answer ✔✔-compound clauses with logical operators (AND,
OR, NOT)
-Ranges using IN or NOT IN or BETWEEN
-Wildcards
SQL UPDATE statement - correct answer ✔✔used to make changes to existing records within a table
UPDATE usedcars
SET price=29995.00
WHERE year='2014'
SQL DELETE statement - correct answer ✔✔used to remove records from a table
DELETE FROM usedcars
WHERE year='2014'
SQL Wildcard underscore (___) - correct answer ✔✔Represents single unspecified character (including a
space) in a specific position in the character string
SQL Wildcard Percent sign (%) - correct answer ✔✔represents any sequence of contiguous unspecified
characters (including spaces) in a specific position in character string
TRIM Function - correct answer ✔✔removes leading and trailing spaces in a text string, but spaces
between words are not removed
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