將字符串轉換爲模式爲

Question

的字符串提供給您一個具有兩種類型分隔符的字符串。提供了表格的模式。如何以有效的方式將分隔字符串轉換爲臨時表？例如，

Andy~22~US|Jane~24~Australia|Davis~30~UK|Nancy~32~Germany 

我是MySql的新手。所以任何幫助將不勝感激？

Answer 1

我會這樣寫它也許有足夠的方式與名稱，但它必須工作！

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; 

Answer 2

謝天謝地，我寫了一個簡單的代碼爲我自己：

DROP procedure IF EXISTS `split_procedure`; 

DELIMITER $$ 

CREATE DEFINER=`cwuser`@`%%` PROCEDURE `split_procedure`(v_stringtosplit text, v_rowdelim CHAR(5), v_coldelim CHAR(5)) 
BEGIN 

SET @replacetosplit := REPLACE(v_stringtosplit, v_rowdelim, '"),("'); 
SET @replacetosplit := REPLACE(@replacetosplit, v_coldelim, '","'); 

SET v_stringtosplit = CONCAT(v_rowdelim, v_stringtosplit); 

SET @no_of_rows = length(v_stringtosplit) - length(replace(v_stringtosplit, v_rowdelim, '')); 
SET @rownum = 1; 
SET @no_of_cols = length(v_stringtosplit) - length(replace(v_stringtosplit, v_coldelim, '')); 
SET @no_of_cols = (@no_of_cols/@no_of_rows); 
SET @colnum = 1; 

DROP TABLE IF EXISTS temporary_split_table; 

SET @strtabcol = 'CREATE TEMPORARY TABLE temporary_split_table ('; 
SET @valcol = ''; 

WHILE(@colnum <= @no_of_cols + 1) 
DO 
    SET @strtabcol = CONCAT(@strtabcol, 'COL', @colnum, ' VARCHAR(1000)', ','); 
    SET @colnum = @colnum + 1; 
END WHILE; 

SET @strtabcol = CONCAT(LEFT(@strtabcol, LENGTH(@strtabcol)-1), ')'); 

PREPARE stmt FROM @strtabcol; 
EXECUTE stmt; 
DEALLOCATE PREPARE stmt; 

SET @strcol = 'INSERT INTO temporary_split_table VALUES("'; 

SET @strcol = CONCAT(@strcol, @replacetosplit, '")'); 
PREPARE stmt FROM @strcol; 
EXECUTE stmt; 
DEALLOCATE PREPARE stmt; 

SELECT * FROM temporary_split_table; 

END$$ 

DELIMITER ; 

請不要忘記使用上述SP後刪除臨時表temporary_split_table。

上述方法，其SP調用是：

call split_procedure('Andy~22~US|Jane~24~Australia|Davis~30~UK|Nancy~32~Germany', '|', '~');