python-mysqlHow can I join two tables in MySQL using Python?
Joining two tables in MySQL using Python can be done using the JOIN
command in a SELECT
statement. The syntax for joining two tables is as follows:
SELECT table1.column1, table2.column2
FROM table1
JOIN table2
ON table1.column1 = table2.column2;
This statement will return all rows from both tables where the column1
of table1
matches the column2
of table2
.
For example, if table1
is a table of student IDs and table2
is a table of student grades, the following statement can be used to join the two tables:
SELECT table1.student_id, table2.grade
FROM table1
JOIN table2
ON table1.student_id = table2.student_id;
## Output example
student_id grade
1 A
2 B
3 C
4 D
Code explanation
SELECT table1.column1, table2.column2
: This part of the statement is used to specify which columns should be returned by the statement. In this example,column1
fromtable1
andcolumn2
fromtable2
are specified.FROM table1
: This part of the statement is used to specify which table should be used as the primary source of data. In this example,table1
is specified.JOIN table2
: This part of the statement is used to specify which table should be joined to the primary table. In this example,table2
is specified.ON table1.column1 = table2.column2
: This part of the statement is used to specify the condition that should be used to join the two tables. In this example,column1
oftable1
is compared tocolumn2
oftable2
.
Helpful links
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