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elena-s [515]
3 years ago
10

Considering the two tables below called Orders and OrderLines, how many rows would be returned by this SQL query? SELECT o.Order

ID, ol.OrderLineID FROM Orders AS o LEFT JOIN OrderLines AS ol ON o.OrderID = ol.OrderID ;

Engineering
1 answer:
natima [27]3 years ago
3 0

Answer:

The query will return four (4) rows

Explanation:

(See attachment below for the table)

The query will return rows where ORDERID is the same on both tables i.e. table ORDERS and ORDERLINES.

The similar rows (on column ORDERID) are 1897 and 87; for table ORDERLINESS and table ORDERS.

But on table ORDERLINESS, there are three rows with 1897 (under ORDERID column).

In total, they have 4 rows in common which are

ORDERID

1897

1897

1897 and

87

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A minor road intersects a major 4-lane divided road with a design speed of 50 mph and a median width of 12 ft. The intersection
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Answer:

minimum sight distance = 699 ft

Explanation:

given data

road lane = 4 divided road

median width = 12 ft

grade road = 5%

solution

we take here time gap factor for minor road vehicle when enter to major road  from table

time gap = 8.1  sec

and for median width of 12 ft

time gap = 8.2 + 0.7 ( 1 + \frac{12}{12}  )  

time gap = 9.5 second

so minimum sight distance will be

minimum sight distance = 1.47 × design speed × time gap  

minimum sight distance = 1.47 × 50  × 9.5

minimum sight distance = 699 ft

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A jet of water 75m in diameter,issues with a velocity of 30m/s and impinge on a stationary plate which distort its forward motio
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Forces exerted by the jet on the plate is=3976N

<h3>How to calculate forces exerted by the jet on the plate?</h3>

A force is an effect that can change the motion of an object. A force can generate an object with mass to change its velocity, i.e., to accelerate. Force can also be explained intuitively as a push or a pull. A force has both volume and direction, making it a vector amount.

A jet of water 75m in diameter

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