What is the SQL command to list the number of product sales (number of rows) and total sales by month and product category with subtotals by month and product category and a grand total for all sales? [Note: use the COUNT() function in the SELECT clause and name your aggregate field NUMPROD and the SUM() function named TOTSALES; use the DWDAYSALESFACT table, the DWTIME table, and the DWPRODUCT table; and a GROUP BY clause with ROLLUP here] 5)Using the answer to Problem 4 as your base, what command would you need to generate the same output but with subtotals in all columns? [Note: use the COUNT() function in the SELECT clause and name your aggregate field NUMPROD and the SUM() function named TOTSALES; use the DWDAYSALESFACT table, the DWPRODUCT table, and the DWTIME table; and a GROUP BY clause with CUBE here]. SCHEMA: CREATE TABLE DWVENDOR ( V_CODE INTEGER PRIMARY KEY, V_NAME VARCHAR(35), V_AREACODE CHAR(3), V_STATE CHAR(2)); CREATE TABLE DWPRODUCT ( P_CODE VARCHAR(10) PRIMARY KEY, P_DESCRIPT VARCHAR(35), P_CATEGORY VARCHAR(5), V_CODE NUMBER REFERENCES DWVENDOR); CREATE TABLE DWREGION ( REG_ID INTEGER PRIMARY KEY, REG_NAME VARCHAR(10)); CREATE TABLE DWCUSTOMER ( CUS_CODE NUMBER PRIMARY KEY, CUS_LNAME VARCHAR(15), CUS_FNAME VARCHAR(15), CUS_INITIAL CHAR(1), CUS_STATE CHAR(2), REG_ID NUMBER REFERENCES DWREGION); CREATE TABLE DWTIME ( TM_ID INTEGER PRIMARY KEY, TM_YEAR INTEGER, TM_MONTH INTEGER, TM_DAY INTEGER, TM_QTR INTEGER); CREATE TABLE DWDAYSALESFACT ( TM_ID NUMBER, CUS_CODE NUMBER, P_CODE VARCHAR(10), SALE_UNITS NUMBER, SALE_PRICE NUMBER, PRIMARY KEY (TM_ID, CUS_CODE, P_CODE));
SQL
SQL stands for Structured Query Language, is a form of communication that uses queries structured in a specific format to store, manage & retrieve data from a relational database.
Queries
A query is a type of computer programming language that is used to retrieve data from a database. Databases are useful in a variety of ways. They enable the retrieval of records or parts of records, as well as the performance of various calculations prior to displaying the results. A search query is one type of query that many people perform several times per day. A search query is executed every time you use a search engine to find something. When you press the Enter key, the keywords are sent to the search engine, where they are processed by an algorithm that retrieves related results from the search index. Your query's results are displayed on a search engine results page, or SER.
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4) What is the SQL command to list the number of product sales (number of rows) and
total sales by month and product category with subtotals by month and product category and
a grand total for all sales? [Note: use the COUNT() function in the SELECT clause and
name your aggregate field NUMPROD and the SUM() function named TOTSALES; use the
DWDAYSALESFACT table, the DWTIME table, and the DWPRODUCT table; and a
GROUP BY clause with ROLLUP here]
5)Using the answer to Problem 4 as your base, what command would you need to
generate the same output but with subtotals in all columns? [Note: use the COUNT()
function in the SELECT clause and name your aggregate field NUMPROD and the SUM()
function named TOTSALES; use the DWDAYSALESFACT table, the DWPRODUCT table,
and the DWTIME table; and a GROUP BY clause with CUBE here].
SCHEMA:
CREATE TABLE DWVENDOR (
V_CODE INTEGER PRIMARY KEY,
V_NAME VARCHAR(35),
V_AREACODE CHAR(3),
V_STATE CHAR(2));
CREATE TABLE DWPRODUCT (
P_CODE VARCHAR(10) PRIMARY KEY,
P_DESCRIPT VARCHAR(35),
P_CATEGORY VARCHAR(5),
V_CODE NUMBER REFERENCES DWVENDOR);
CREATE TABLE DWREGION (
REG_ID INTEGER PRIMARY KEY,
REG_NAME VARCHAR(10));
CREATE TABLE DWCUSTOMER (
CUS_CODE NUMBER PRIMARY KEY,
CUS_LNAME VARCHAR(15),
CUS_FNAME VARCHAR(15),
CUS_INITIAL CHAR(1),
CUS_STATE CHAR(2),
REG_ID NUMBER REFERENCES DWREGION);
CREATE TABLE DWTIME (
TM_ID INTEGER PRIMARY KEY,
TM_YEAR INTEGER,
TM_MONTH INTEGER,
TM_DAY INTEGER,
TM_QTR INTEGER);
CREATE TABLE DWDAYSALESFACT (
TM_ID NUMBER,
CUS_CODE NUMBER,
P_CODE VARCHAR(10),
SALE_UNITS NUMBER,
SALE_PRICE NUMBER,
PRIMARY KEY (TM_ID, CUS_CODE, P_CODE));
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