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What does the term foreign key mean in databases?
The foreign key is used as a reference in a table to the primary key of another table. For example: consider a table employee with id(primary key), name, address,department_id(foreign key) as its fields.Another table department with fields department_id(primary key) and dept_name. So, department_id is primary key in department table and foreign key in employee table.
Can a primary key be a foreign key?
Yes, a primary key can also be a foreign key. This is known as a composite key, where one or more columns in a table are both primary keys for that table and also act as foreign keys linking to another table.
What does it mean to table something in Congress?
A MOTION TO TABLE, if adopted, permanently kills the pending matter. It also ends any further debate."Finalization" basically.
What is a sentence using the word set as a verb?
Set the dish on the table and sit down.The hen will set on her eggs to hatch them. Today the sun will set at 6:15.
What is the function of a Foreign Key in SQL?
A Foreign Key in SQL is used to establish a relationship between two tables. It ensures referential integrity by enforcing that values in a column (or columns) in one table must match the values in a primary key in another table. This helps maintain consistency and data integrity across linked tables.
What is Fe from the periodical table?
Iron.
What do you call the table of minerals?
Periodical chart
What does Ca on the periodical table mean?
Calcium
How many chemicals are on the periodical table?
about 106 are on a periodic table for the very time being
Why is hydrogen part of the s section of the periodical table?
Because it is an element.
What in Na?
Na is an element found on the periodical table. It is the chemical symbol for Sodium.
Who was the Russian chemist who first organized chemicals into the periodical table?
Dmitri Mendeleev
What is the masss of iron in the periodical table of elements?
it is 56 because you round it of and it used to be 55.85
What does S stand for on the periodical table of elements?
Sulphur/ Sulfur --> S (in capital letter) in the periodic table
What family tends to gain one election in periodical table?
For halogens this is the only way to react as oxidant.
Do you have to memorize the periodic table for your chemistry exam?
No, you do not have to memorize the entire periodic table for your chemistry exam. However, you should be familiar with the trends and patterns within the table.
What is the symbol of mercury in the periodical table of elements?
The chemical symbol for Mercury is Hg. The atomic number for the element is 80. It is one of the only liquid elements on the table.
