将数据从一个数据库传输到另一个 MYSQL

Question

I have 3 data bases in phpmyadmin and I need some help in the migration of data from one database to another.

1. First data base: Name of the database: ethernet Name of the table: data

Table:

CREATE TABLE ethernet.data(
    id INT NOT NULL AUTO_INCREMENT PRIMARY KEY,
    event TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
    Count0 VARCHAR(10) NOT NULL,
    Count1 VARCHAR(10) NOT NULL,
    Count2 VARCHAR(10) NOT NULL,
    FPY VARCHAR(10) NOT NULL,
)

2. 2nd data base: Name of the database: ethernet1 Name of the table: data1

Table:

CREATE TABLE ethernet1.data1(
    id INT NOT NULL AUTO_INCREMENT PRIMARY KEY,
    event TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
    Count0 VARCHAR(10) NOT NULL,
    Count1 VARCHAR(10) NOT NULL,
    Count2 VARCHAR(10) NOT NULL,
    FPY VARCHAR(10) NOT NULL,
)

3. 3rd database: Name of the database: ethernet Name of the table: data

Table:

CREATE TABLE fpydcih.data2(
    id INT NOT NULL AUTO_INCREMENT PRIMARY KEY,
    event TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
    FPYSVSL VARCHAR(10) NOT NULL,
    FPYZ2FS VARCHAR(10) NOT NULL,
)

The ideea is to export last 10 values from the ethernet.data FPY column and last 10 values from ethernet1.data1 FPY column and export them in the fpydcih.data2 table.

Answer 1

This is just to show the idea, I haven't checked it as I don't want to create 3 schemas.

SET @id1 = 0;
SET @id2 = 0;

INSERT INTO fpydcih.data2 (FPYSVSL, FPYZ2FS)
SELECT 
    t1.FPY FPYSVSL, t2.FPY FPYZ2FS 
FROM 
    (
        SELECT @id1 = @id1 + 1 id, FPY 
        FROM ethernet.data
        ORDER BY id DESC
        LIMIT 10
    ) t1
LEFT JOIN
    (
        SELECT @id2 = @id2 + 1 id, FPY 
        FROM fpydcih.data2
        ORDER BY id DESC
        LIMIT 10
    ) t2 ON t2.id = t1.id
;

Answer 2

You seem to want union all . Something like this:

insert into fpydcih.data2 (id, event, count0, count1, count2, count3, fpa)
    (select id, event, count0, count1, count2, count3, fpa
     from ethernet.data
     order by event desc
     limit 10
    ) union all
    (select id, event, count0, count1, count2, count3, fpa
     from ethernet1.data1
     order by event desc
     limit 10
    );

You can also phrase this as two separate insert s. Or if the destination table doesn't exist, use create table as .