Answer to: Describe the use of keys in a database. Can you have more than one key? Explain. By signing up, you'll get thousands of step-by-step...
What are the advantages of secondary data over primary data? Explain three different methods for primary data collection. Market Research: Market research is an important step in product development and inadequate research may result in significant issues...
A plan table name if you are using a table different than PLAN_TABLE A statement ID if you have set a statement ID with the EXPLAIN PLAN A format option that determines the level of detail: BASIC, SERIAL, and TYPICAL, ALL, Some examples of the use of DBMS_XPLAN to display PLAN_TA...
A database table must have a primary key and may also have foreign keys. When a database is normalized the data will appear only once in one table and will not be duplicated in another table.Answer and Explanation: Become a member and unlock all...
The SQL uses some operators to throw queries like SELECT uses to selects a data value and shown on the output screen, Where uses for conditions, Group by uses to group the output, Joins uses to join the two or more tables with the ...
Give an example of each. What are the advantages and disadvantages of a relational database? Explain the importance of determining relationships before establishing primary keys in the design sequence. What do you see as the primary advantage of ...