how to make a database on a stationary ?????? can any one make it please little urgent
Answers
To create a new table in a PostgreSQL database, you use the following steps:
- First, construct a CREATE TABLE statement.
- Next, connect to the PostgreSQL database by calling the connect() function. ...
- Then, create a cursor object by calling the cursor() method of the connection object
- hope it's helpful
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Explanation:
zAnimals
How Do Snails Get Their Shells?
BY MARK MANCINI MAY 3, 2018
A snail's shell, which is made up of primarily calcium carbonate, begins forming during the snail's gestation period. KLAUS VARTZBED/EYEEM/GETTY IMAGES
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A lot of people like to spoil their pet hermit crabs. Do a quick Google search and you'll find designer shells built especially for the pocket-sized crustaceans. There's a market for the pretty trinkets because hermit crabs (mostly) live inside empty shells that other animals have left behind. Take one of these crabs out of its portable home and it'll scuttle off to find a new one.
Snails don't have this option. The slow-moving mollusks grow protective shells to which they are physically attached. Eviction means death, as no snail can survive being torn away from its private, calcified fortress. But how exactly do snail shells develop — and what sets them apart from some other types of animal armor?
Before we get to that, a bit of snail 101: The total number of snail species could be as high as 43,000. Most of us are familiar with the land-based varieties or those that live in ponds, but marine snails also exist. When it comes to procreation, certain species reproduce sexually while others are self-fertilizing hermaphrodites. Hey whatever gets the job done, right?
They do all have one thing in common: Snails all hatch from eggs. Generally, the parents lay these in loose soil or affix them to rocks, though a few species are ovoviviparous, meaning that their eggs hatch inside the mother's body. The newborns then squirm out and face the world. hahHa