mysql pivot table

MYSQL: temporary table problems, does not support self-join bitsCN.com MYSQL: temporary table problem, does not support self-join Temporary table Problems The following list indicates limitations on the use of TEMPORARY tables: A temporary

;------------Use mydatabase;create tableif notExistsclass(name varchar (20), the guest (20)); Additional notes: If not exists is the first to check if there is a table with the same name, and if it does, no subsequent creation statements are executed. If you do not specify a table option, the default, such as the MySQL default storage

Mysql show table status method for obtaining table information, mysqlstatus Usage mysql>show table status;mysql>show table status like 'esf_seller_history'\G;

We know that,MySQLDatabases are often combined with PHP to develop powerful applications. So for those who are new to PHP programming, it is necessary to understand some simple MySQL database operations. In this article, we useAlter tableStatement to modify the table structure. Next let's take a look at this part. 1. Add Columns Alter table tbl_name add col_name

MySQL multi-table operations and batch processing methods (3) 3. add Records We have already discussed how to add a record to repeat this record for ease of viewing: 　　 Mysql> insert into mytable-> Values ('ABC', 'F', '1966-08-17', 'China', 'n ′);Query OK, 1 row affected (0.05 sec) Check it out: Mysql> select * from

Mysql deletes the 7g large table bitsCN.com online without performance impact Mysql deletes 7g large tables online without performance impact How to delete a 7G (or larger) large table in the mysql database so that it does not affect the I/O of the server, resulting in per

ALTER table: Add, modify, delete table columns, constraints, and other table definitions. View column: Desc table name; Modify table name: ALTER TABLE T_book Rename to BBB; Add column: ALTER