First, the database operations
1. Create a database
the Create Database < database name > ; - for example, create a test database, create database test;
2, all database queries
3, delete the database
drop Database < database name >
4, connect to the database
use < database name > ; - e.g., a test database, use test command;
5, view the database currently in use
6, view all current database table
7, export the database
mysqldump - U user name - the p-- default - Character - the SET = latin1 database name > exported file name (database default encoding is latin1)
8, export a table
mysqldump - U user name - the p-watches database name > exported file name
9, export the database structure
the mysqldump - U username - P - D - the Add - drop - Table database name > exported file name
- -d no data -add-drop-table to add a drop table before each create statement
Second, the operating table
1, create a table
Create Table < table name > ( < field name > < type > [ , .. <field name n> <n-type> ] );
2, an acquisition table structure
desc table name, or the Columns Show from table
3, delete the table
4, insert data
INSERT INTO < table name > [ (<field name> [, .. <field name n-> ] )] values (value) [ , (n-value) ]
5, the data look-up table
1 ), query all rows
the SELECT < fields, fields, ... > from < table > the WHERE < expression > ;
the SELECT * from tableName;
2 ), several lines of inquiry before
the SELECT * from tableName limit 0 , 2 ;
6, delete table data
the Delete from table where expressions
7, update table data
update table set field = new value, ... the WHERE condition
8, increase table field
ALTER Table table add field types other;
9, to change the name of the table
the rename the Table original table to the new table name;