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MatroZZZ [7]
3 years ago
6

You have important data on your hard drive that is not backed up and your Windows installation is so corrupted you know that you

must refresh the entire installation. What do you do first? a.Use System Restoreb.Make every attempt to recover the datac.Perform an in-place upgrade of Windows d.Reformat the hard drive and reinstall Windows
Computers and Technology
1 answer:
Solnce55 [7]3 years ago
4 0

Answer:

b.Make every attempt to recover the data

Explanation:

If you have important data on your hard drive that is not backed up and your Windows installation is so corrupted you know that you must refresh the entire installation you should  make every attempt to recover the data.

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The following SQL statement uses a(n) _____. SELECT P_CODE, P_DESCRIPT, P_PRICE, V_NAME FROM PRODUCT, VENDOR WHERE PRODUCT.V_COD
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Answer:

The answer is c. “old-style” join.

Explanation:

SELECT P_CODE, P_DESCRIPT, P_PRICE, V_NAME

FROM PRODUCT, VENDOR

WHERE PRODUCT.V_CODE = VENDOR.V_CODE;

The SELECT clause represents all the columns to be displayed.

The FROM clause represents the tables which are used to extract the columns.

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1. Using JOIN keyword

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SELECT column1, column2

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ON table1.column3 = table2.column3;

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Two tables are taken at a time when JOIN keyword is used.

If more tables are to be used, they are mentioned as follows.

SELECT column1, column2

FROM table1 JOIN table2

ON table1.column3 = table2.column3

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( ON table3.column5 = table2.column5 )  

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The given query can be re-written using JOIN as shown.

SELECT P_CODE, P_DESCRIPT, P_PRICE, V_NAME

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Tables to be used are mentioned in FROM clause separated by commas.

Tables are joined based on the same column having same values.

Multiple tables can be joined using this style as follows.

SELECT column1, column2

FROM table1, table2, table3, table4

WHERE table1.column3 = table2.column3

AND table3.column5=table1.column5

AND table3.column4 = table2.column4;

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