Introducing several ways to replicate tables in MySQL
Several ways to copy a table
- Copy onlytable structure
create table tableName like someTable;
Only the table structure, including primary keys and indexes, will be copied, but the table data will not be copied
- Only the table data will be copied
##create table tableName select * from someTable;Copy the general structure of the table and all data, and will not copy the primary key, index, etc.
- Complete copy
create table tableName like someTable;insert into tableName select * from someTable;
Complete in two steps, copy first Table structure, then insert data
Related free learning recommendations:
Example
- Connect to the database, use the student database and view all data tables
-
USE student;SHOW TABLES;
Copy after login
2. Create the t1 data table and insert two items Record and set the index for the name field
CREATE TABLE t1(
id INT NOT NULL AUTO_INCREMENT PRIMARY KEY,
name VARCHAR(50) COMMENT '姓名');INSERT INTO t1(name) VALUES('张三');INSERT INTO t1(name) VALUES('李四');CREATE INDEX idx_name ON t1(name);
3. View all records of the t1 data table
SELECT * FROM t1;
4. View the index of the t1 data table
SHOW INDEX FROM t1\G;
5. Create the t2 data table (only copy the table structure)
CREATE TABLE t2 LIKE t1;
6. View the records of the t2 data table
SELECT * FROM t2;
7. View the index of the t2 data table
SHOW INDEX FROM t2\G;
8. View the structure of the t2 data table
SHOW CREATE TABLE t2\G;
9. Create the t3 data table ( Only copy table data)
CREATE TABLE t3 SELECT * FROM t1;
10. View the table structure of the t3 data table
SHOW CREATE TABLE t3\G;
11. View the index of the t3 data table
SHOW INDEX FROM t3;
12. View all records of the t3 data table
SELECT * FROM t3;
13. Create t4 data table (complete copy)
CREATE TABLE t4 LIKE t1;INSERT INTO t4 SELECT * FROM t1;
14. View the structure of t4 data table
SHOW CREATE TABLE t4\G;
15. View the index of the t4 data table
SHOW INDEX FROM t4\G;
16. View all records of the t4 data table
SELECT * FROM t4;
Related free learning recommendations:mysql database(video)
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