Home Database Mysql Tutorial How to use while to batch insert data in mysql storage

How to use while to batch insert data in mysql storage

May 27, 2023 am 10:07 AM
mysql while

    ##Batch submission

    while statement writing method:

        while '条件' do
                循环体语句;
        end while;
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    Complete writing method

    drop procedure if exists test_insert;
    delimiter $$
    create procedure test_insert(n int)
        begin
        declare v int default 0;
        set AUTOCOMMIT = 0;
        while v < n
            do
                    insert into test(second_key, text, field_4,status, create_date)
                    values ((v*10),
                    concat(&#39;t&#39;,v),
                    substring(md5(rand()), 1, 10),
                    &#39;good&#39;,
                    adddate(&#39;1970-01-01&#39;, rand(v) * 10000));
            set v = v + 1;
         end while;
          set AUTOCOMMIT = 1;
    end$$
    delimiter ;
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    View and delete stored procedures:

    mysql> show procedure status like &#39;test_insert&#39;;
    mysql> show create procedure test_insert\G;
    mysql> drop procedure if exists test_insert;
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    Create table

    CREATE TABLE test (
    id INT NOT NULL AUTO_INCREMENT,
    second_key INT,
    text VARCHAR(20),
    field_4 VARCHAR(20),
    status VARCHAR(10),
    create_date date,
    PRIMARY KEY (id),
    KEY idx_second_key (second_key)
    ) Engine=InnoDB CHARSET=utf8;
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    Insert 1 million pieces of data

    mysql> call test_insert(1000000);
    Query OK, 0 rows affected (31.86 sec)
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    Single submission

    Complete writing method

    drop procedure if exists test_insert;
    delimiter $$
    create procedure test_insert(n int)
        begin
        declare v int default 0;
        while v < n
            do
                    insert into test(second_key, text, field_4,status, create_date)
                    values ((v*10),
                    concat(&#39;t&#39;,v),
                    substring(md5(rand()), 1, 10),
                    &#39;good&#39;,
                    adddate(&#39;1970-01-01&#39;, rand(v) * 10000));
            set v = v + 1;
         end while;
    end$$
    delimiter ;
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    Insert 10,000 pieces of data

    mysql> call test_insert(10000);
    Query OK, 1 row affected (1 min 8.52 sec)
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    Open another window to view

    mysql> select count(*) from test.test;
    +----------+
    | count(*) |
    +----------+
    |     1428 |
    +----------+
    1 row in set (0.00 sec)
    mysql> select count(*) from test.test;
    +----------+
    | count(*) |
    +----------+
    |     1598 |
    +----------+
    1 row in set (0.00 sec)
    mysql> select count(*) from test.test;
    +----------+
    | count(*) |
    +----------+
    |     1721 |
    +----------+
    1 row in set (0.00 sec)
    mysql> select count(*) from test.test;
    +----------+
    | count(*) |
    +----------+
    |     1983 |
    +----------+
    1 row in set (0.00 sec)
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