What is the way to backup database in mysql

1. Back up all databases:

shell>mysqldump -uroot -p --all-database > all.sql

2. Back up database test

shell>mysqldump -uroot -p test > test.sql

3. Back up database Table emp under test

shell> mysqldump -uroot -p test emp > emp.sql

4, backup table emp under database test and dept

shell> mysqldump -uroot -p test emp dept > emp_dept.sql

5, Back up all tables under database test as comma-separated text to /tmp:

shell> mysqlddump -uroot -p -T /tmp test emp --fields-terminated-by ','
shell> more emp.txt  
 
1,z1
2,z2
3,z3
4,z4

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