mysql copy table to another table

In order to better optimize MySQL in high concurrency, it is necessary to understand the locking table mechanism when MySQL query is updated.I. OverviewMySQL has three levels of Lock: page level, table level, row level.MyISAM and MemoryStorageThe

Document directory MySQL table replication MySQL table modification Delete a MySQL table I didn't want to write this section, because it was very troublesome. There were many examples, which were representative, and I knew everyone was bored.

MySQL creates a table and creates a . frm file to save the table and column definitions. The index is stored in one . MYI (Myindex) and the data is stored in the . MYD (MYData) file extension. First, using Show/describe statement to display the data

When creating a table, MySQL creates a. frm file to save the table and column definitions. Indexes are stored in a file with the. MYI (MYindex) Extension and data is stored in a file with the. MYD (MYData) extension. 1. Use the SHOW/DESCRIBE

1. Copy table structure and data to new table CREATE table new Table select * from old table 2. Only copy table structure to new Table Method 1: (Low version of MySQL is not supported, mysql4.0.25 not supported, MYSQL5 already supported)

Table partitioning is only recently known Oh, I used to do is the table to achieve the billion level of data, I would like to give you a description of the MySQL table partition to create and use it, I hope to be helpful to you classmates. Table

A lock is a mechanism by which a computer coordinates multiple processes or a purely thread concurrently accessing a resource. in a database, data is a resource that is shared by many users in addition to the contention of traditional computing

SQL Study Notes (14) ------------ data table, SQL statement for creating a data table Operations on Data TablesBasic Database OperationsWith MySQL, you can choose between the three basic database table formats (version 3.23. When creating a table,

CREATE TABLE tab2 as (SELECT * from TAB1)The storage engine for this practice table also uses the server's default storage engine instead of the source table's storage engine, which copies the contents of the table together.CREATE talbe tab2

First, let's talk about why the tables are divided.When a piece of data reaches millions of, you spend more time searching for it, and if you have a joint query, I think it's possible to die there. The purpose of the sub-table is to reduce the