What does join mean and what does join mean?

vt.Attend; Combine; Connect.

vi.Join; Attend; Combine;

n.Combine; Connect. Junctions.

<> disadvantage is generally that correction is not modification. Li Hui's grades have improved significantly by constantly correcting her shortcomings.

According to my 12 years of study, "join" should mean "participate".

It seems that you haven't learned this yet, the use of join in SQL statements is to make joins, and joins are based on the common fields between these tables, combining rows from two or more tables. The common ones are inner join, left join, and right join. Writing join directly represents an inner join.

I won't talk about the specifics here.,You search for SQL connections on a lot of blogs, forums and the like will explain in detail.,Hope.。

join

English] [d n] [American] [d n].

vt.& vi.Connect. Coupling; Join; Attend;

vt.Combine; Participate; on (trains, planes, etc.); on (road);

n.Connect. Combine; junctions; Junctions.

Third person singular number: joins Past participle: joined Present continuous tense: joining Past tense: joined

Example sentence: perhaps kosovo could join them

Perhaps Kosovo could join them.

In the database, the inner join keyword returns a row when there is at least one match in the table.

The specific syntax is as follows:

from Sloth Academy.

Note: Inner join is the same as join.

inner join.

An inner join is a link between two or more tables, according to the association conditions, all matching records are displayed, and those that do not match are not displayed.

The following two are standard spellings:

sql> select ename,sal2 from emp2 e inner join dept2 d3 on ;

You can also omit the inner keyword and write joinsql> select ename,sal2 from emp2 e join dept2 d3 on ;

If the names of the associated fields in the two tables are the same, you can also use the using clause.

sql> select ename,sal2 from emp2 e join dept2 d3 using(deptno);

inner join in the database

It means that the bureau prepares a beam to combine two or more tables in a record that has the same value in the common field. That is, the records of multiple tables are integrated according to the relationship between columns. Here's an example. Roll the sentence.

persons"Table, primary key.

Yes"id_p"columns, the primary key in each table is a unique column:

orders"table, the primary key is"id_o"columns,"id_p"Columns link the two tables:

select , from persons

inner join orderson

order by

In VB, join is to merge the elements of a one-dimensional array with a specified symbol from a string.

Such as the array arr(0)="1"

arr(1)="2"

arr(2)="3"

Then s = join(arr) results in s="1 2 3"

s=join(arr,"；"Result s="1；2；3"

Documentation:The join function returns a string that is created by concatenating multiple substrings in an array.

syntax, join(list[, delimiter]):

The syntax of the join function has the following parts:

Section description.

list is required, and contains a one-dimensional array of concatenated substrings.

delimiter is optional. Used in the return string to separate the characters of the substring. If the item is ignored, a space (.)" "Come on.

Separate substrings. If the delimiter is a zero-length string (""), all items in the list are concatenated together with no separators in between.

Assemble the elements of the array into a string.

For example, if there is an array a, the element a has 1, 2, 3, 4, 5;

Then join(a,"|"The result is 1|2|3|4|5

It is to merge the elements in a one-dimensional array with a specified symbol from a string.

Such as the array arr(0)="1"

arr(1)="2"

arr(2)="3"

Then s = join(arr) results in s="1 2 3"

s=join(arr,"；"Result s="1；2；3"

Documentation: Join function.

The description returns a string that is created by concatenating multiple substrings in an array.

syntax, join(list[, delimiter]):

The syntax of the join function has the following parts:

Section description.

list required. A one-dimensional array containing the concatenated substrings.

delimiter is optional. Used in the return string to separate the characters of the substring. If the item is ignored, a space (.)" "Come on.

Separate substrings. If the delimiter is a zero-length string (""), all items in the list are concatenated together with no separators in between.

join[eng][d in] [American][d n]vt.& vi.Connect. Coupling; Join; Attend;

vt.Combine; Participate; on (trains, planes, etc.); On (road) nConnect. Combine; junctions; Junctions.

Present participle: joining; Past tense: joined; Third person singular: joins; Past participle: joined;