Para convertir una cadena en una tabla con esquema

Lo escribiría así, tal vez haya suficiente con Name , ¡pero tiene que funcionar!

Create table MIX (
`id` int not null,
`x` text not null)
ENGINE = InnoDB;
insert into mix value (1,'Andy~22~US|Jane~24~Australia|Davis~30~UK|Nancy~32~Germany');
create table unmix select
numbers.n as id,
SUBSTRING_INDEX(SUBSTRING_INDEX(x, '~', 2*numbers.n),'~', -1) as Age,
SUBSTRING_INDEX(SUBSTRING_INDEX(x, '|', 1*numbers.n),'~', -1) as Country,
substring_index(SUBSTRING_INDEX(SUBSTRING_INDEX(x,'~', 2*numbers.n),'|',-1),'~',+1) as Name
from
(select 1 n union all
 select 2 union all 
 select 3 union all select 4 ) 
 numbers INNER JOIN mix
on CHAR_LENGTH(mix.x)
 -CHAR_LENGTH(REPLACE(mix.x, ' ', ''))>=numbers.n-4;