What does desert yimi mean, and what is the biz layer of java?

Desert Yimi grows in the desert areas of Africa, in obscurity, and few people have paid attention to it. Many visitors think it's just a grass. However, it will suddenly bloom into beautiful flowers one early morning.

It was an incomparably gorgeous flower, as if it was about to occupy all the colors of the world. Its petals are in the shape of lotus leaves, competing with the poisonous sun over the land of Africa.

But it has a short flowering period, only two days. After two days it will wither, and flowering means the end of its life.

But why does the emyca bloom in the last moments of its life? Plant experts have solved the mystery.

Plants need water to grow, and flowering plants have a greater need for water. Plants in Africa generally have large root systems that draw water for their own water needs. However, the Imi flower has no root system, it has only a single taproot, and it snaked lonely and coils deep into the earth, looking for a place where there is water.

It was a process that required luck and tenacious effort, and it often took four to five or six to seven years for a single plant to find water in a dry desert, then little by little it accumulated nutrients, and when it had all the nutrients needed for the bud, it flowered. So at its most beautiful, it withers because it has exhausted all its nutrients.

If the flower grows in a place where water and grass are abundant, it will be beautiful for a lifetime. However, its hometown is in the desert.

There is a time when everything in this world is brilliant, and this is the right given by God to all things.

The origin of the name Yimi: In the African desert tribes, called this small flower Yimi, has the meaning of tenacious, sacred. Transliterated, it has a cute name: Yimi.

Emia is a flower that grows in the desert areas of Africa. That's why it's called desert Yimi.

But this flower is quite obscure.

Oracle database connection queries include equal value joins, external joins, and self-joins.

The addition of (+) in the where clause is a type of outer join. External connections: left outer connection and right outer connection.

select * from emp,dept where ;Right outer connection.

select * from emp,dept where ;Left outer connection.

Even if the data on the (+) side does not exist, the data on the other side can still be displayed.

Outer connection, there is a left outer connection and right external connection, depending on which end of the condition is added.

Where is it written, is it in SQL?

It should be in some language, used to connect strings.

Biz is the abbreviation of Bisiniss, which represents the business logic layer.

Four-colored Imi flowers in the desert?

Desert Yimi? You're still far away! ~

SQL statements.

select get_name(789) from dual;

Execute the command. exec get_name(789)

PLSQL calls.

declare

name_ varchar2(100);

beginname_ = get_name(789);

end;

call process name (actual transfer value);

or the name of the execute procedure (the actual transfer value);

Inner strength is more important than anything else! Don't worry, you'll grow taller! There is a classmate who is about the same as you in junior high school, and after high school, he suddenly got up tall, and now he is 180!

Men develop late, so they don't need to be too anxious about their height