如何将mySQL中select列的结果拆分为多个列
我在MYSQL数据库中有一个列，我想提取该列数据并将其拆分为多个列。这里是我想拆分的数据示例 ``` ``` 我想用第一个数据将其分成两列： 正如您所注意到的，这些数据具有不同的长度，并且希望能够拆分任意长度的数据，请看这里[ 但我不认为这是我想要的结果，我得到的结果是这样的，我也想修剪数据上的所有其他大括号和引号 ```如何将mySQL中select列的结果拆分为多个列,mysql,split,substring,trim,Mysql,Split,Substring,Trim,我在MYSQL数据库中有一个列，我想提取该列数据并将其拆分为多个列。这里是我想拆分的数据示例 ``` ``` 我想用第一个数据将其分成两列： 正如您所注意到的，这些数据具有不同的长度，并且希望能够拆分任意长度的数据，请看这里[ 但我不认为这是我想要的结果，我得到的结果是这样的，我也想修剪数据上的所有其他大括号和引号 ``` ```如果你能接受程序和游标 drop procedure if exists p; delimiter // CREATE DEFINER=`root`@`localho
```如果你能接受程序和游标
drop procedure if exists p;
delimiter //
CREATE DEFINER=`root`@`localhost` PROCEDURE `p`(
IN `instring` varchar(255)
)
LANGUAGE SQL
NOT DETERMINISTIC
CONTAINS SQL
SQL SECURITY DEFINER
COMMENT ''
begin
declare tempstring varchar(10000);
declare outstring varchar(100);
declare c1 varchar(100);
declare c2 varchar(100);
declare checkit int;
declare done int;
DECLARE CUR1 CURSOR for SELECT t.col FROM T;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE;
drop table if exists occursresults;
create table occursresults (col1 varchar(20), col2 varchar(20));
open CUR1;
read_loop: LOOP
FETCH CUR1 INTO tempstring;
if done then leave read_loop; end if;
set tempstring = replace(tempstring,'{','');
set tempstring = replace(tempstring,'}','');
set tempstring = replace(tempstring,'"','');
set checkit = 0;
#select tempstring;
looper: while tempstring is not null and instr(tempstring,',') > 0 do
set checkit = checkit + 1;
if checkit > 100 then #In case of infinite loop
leave looper;
end if;
set outstring = substr(tempstring,1,instr(tempstring, ',') - 1);
set tempstring = ltrim(rtrim(replace(tempstring,concat(outstring,','),'')));
set c1 = substr(outstring,1,instr(outstring, ':') - 1);
set c2 = replace(outstring,concat(c1,':'),'');
INSERT INTO OCCURSRESULTS (COL1,COL2) VALUES (c1,c2);
# select tempstring,outstring,c1,c2;
end while;
#select tempstring;
set outstring = tempstring;
set c1 = substr(outstring,1,instr(outstring, ':') - 1);
set c2 = replace(outstring,concat(c1,':'),'');
INSERT INTO OCCURSRESULTS (Col1,Col2) VALUES (c1,c2);
end loop;
close cur1;
end //
delimiter ;
MariaDB [sandbox]> select * from t;
+---------------------------------------------------------------------+
| col |
+---------------------------------------------------------------------+
| {"1744":"1","1745":"1","1747":"1","1748":"1","1749":"1","1750":"1"} |
| {"1759":"1"} |
| {"47":"1","48":"Ehebr","49":"1479977045596.jpg"} |
+---------------------------------------------------------------------+
3 rows in set (0.00 sec)
MariaDB [sandbox]>
MariaDB [sandbox]> call p(1);
Query OK, 0 rows affected (0.65 sec)
MariaDB [sandbox]>
MariaDB [sandbox]> SELECT * FROM OCCURSRESULTS;
+------+-------------------+
| col1 | col2 |
+------+-------------------+
| 1744 | 1 |
| 1745 | 1 |
| 1747 | 1 |
| 1748 | 1 |
| 1749 | 1 |
| 1750 | 1 |
| 1759 | 1 |
| 47 | 1 |
| 48 | Ehebr |
| 49 | 1479977045596.jpg |
+------+-------------------+
10 rows in set (0.00 sec)
如果你能接受程序和游标
drop procedure if exists p;
delimiter //
CREATE DEFINER=`root`@`localhost` PROCEDURE `p`(
IN `instring` varchar(255)
)
LANGUAGE SQL
NOT DETERMINISTIC
CONTAINS SQL
SQL SECURITY DEFINER
COMMENT ''
begin
declare tempstring varchar(10000);
declare outstring varchar(100);
declare c1 varchar(100);
declare c2 varchar(100);
declare checkit int;
declare done int;
DECLARE CUR1 CURSOR for SELECT t.col FROM T;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE;
drop table if exists occursresults;
create table occursresults (col1 varchar(20), col2 varchar(20));
open CUR1;
read_loop: LOOP
FETCH CUR1 INTO tempstring;
if done then leave read_loop; end if;
set tempstring = replace(tempstring,'{','');
set tempstring = replace(tempstring,'}','');
set tempstring = replace(tempstring,'"','');
set checkit = 0;
#select tempstring;
looper: while tempstring is not null and instr(tempstring,',') > 0 do
set checkit = checkit + 1;
if checkit > 100 then #In case of infinite loop
leave looper;
end if;
set outstring = substr(tempstring,1,instr(tempstring, ',') - 1);
set tempstring = ltrim(rtrim(replace(tempstring,concat(outstring,','),'')));
set c1 = substr(outstring,1,instr(outstring, ':') - 1);
set c2 = replace(outstring,concat(c1,':'),'');
INSERT INTO OCCURSRESULTS (COL1,COL2) VALUES (c1,c2);
# select tempstring,outstring,c1,c2;
end while;
#select tempstring;
set outstring = tempstring;
set c1 = substr(outstring,1,instr(outstring, ':') - 1);
set c2 = replace(outstring,concat(c1,':'),'');
INSERT INTO OCCURSRESULTS (Col1,Col2) VALUES (c1,c2);
end loop;
close cur1;
end //
delimiter ;
MariaDB [sandbox]> select * from t;
+---------------------------------------------------------------------+
| col |
+---------------------------------------------------------------------+
| {"1744":"1","1745":"1","1747":"1","1748":"1","1749":"1","1750":"1"} |
| {"1759":"1"} |
| {"47":"1","48":"Ehebr","49":"1479977045596.jpg"} |
+---------------------------------------------------------------------+
3 rows in set (0.00 sec)
MariaDB [sandbox]>
MariaDB [sandbox]> call p(1);
Query OK, 0 rows affected (0.65 sec)
MariaDB [sandbox]>
MariaDB [sandbox]> SELECT * FROM OCCURSRESULTS;
+------+-------------------+
| col1 | col2 |
+------+-------------------+
| 1744 | 1 |
| 1745 | 1 |
| 1747 | 1 |
| 1748 | 1 |
| 1749 | 1 |
| 1750 | 1 |
| 1759 | 1 |
| 47 | 1 |
| 48 | Ehebr |
| 49 | 1479977045596.jpg |
+------+-------------------+
10 rows in set (0.00 sec)
drop procedure if exists p;
delimiter //
CREATE DEFINER=`root`@`localhost` PROCEDURE `p`(
IN `instring` varchar(255)
)
LANGUAGE SQL
NOT DETERMINISTIC
CONTAINS SQL
SQL SECURITY DEFINER
COMMENT ''
begin
declare tempstring varchar(10000);
declare outstring varchar(100);
declare c1 varchar(100);
declare c2 varchar(100);
declare checkit int;
declare done int;
DECLARE CUR1 CURSOR for SELECT t.col FROM T;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE;
drop table if exists occursresults;
create table occursresults (col1 varchar(20), col2 varchar(20));
open CUR1;
read_loop: LOOP
FETCH CUR1 INTO tempstring;
if done then leave read_loop; end if;
set tempstring = replace(tempstring,'{','');
set tempstring = replace(tempstring,'}','');
set tempstring = replace(tempstring,'"','');
set checkit = 0;
#select tempstring;
looper: while tempstring is not null and instr(tempstring,',') > 0 do
set checkit = checkit + 1;
if checkit > 100 then #In case of infinite loop
leave looper;
end if;
set outstring = substr(tempstring,1,instr(tempstring, ',') - 1);
set tempstring = ltrim(rtrim(replace(tempstring,concat(outstring,','),'')));
set c1 = substr(outstring,1,instr(outstring, ':') - 1);
set c2 = replace(outstring,concat(c1,':'),'');
INSERT INTO OCCURSRESULTS (COL1,COL2) VALUES (c1,c2);
# select tempstring,outstring,c1,c2;
end while;
#select tempstring;
set outstring = tempstring;
set c1 = substr(outstring,1,instr(outstring, ':') - 1);
set c2 = replace(outstring,concat(c1,':'),'');
INSERT INTO OCCURSRESULTS (Col1,Col2) VALUES (c1,c2);
end loop;
close cur1;
end //
delimiter ;
MariaDB [sandbox]> select * from t;
+---------------------------------------------------------------------+
| col |
+---------------------------------------------------------------------+
| {"1744":"1","1745":"1","1747":"1","1748":"1","1749":"1","1750":"1"} |
| {"1759":"1"} |
| {"47":"1","48":"Ehebr","49":"1479977045596.jpg"} |
+---------------------------------------------------------------------+
3 rows in set (0.00 sec)
MariaDB [sandbox]>
MariaDB [sandbox]> call p(1);
Query OK, 0 rows affected (0.65 sec)
MariaDB [sandbox]>
MariaDB [sandbox]> SELECT * FROM OCCURSRESULTS;
+------+-------------------+
| col1 | col2 |
+------+-------------------+
| 1744 | 1 |
| 1745 | 1 |
| 1747 | 1 |
| 1748 | 1 |
| 1749 | 1 |
| 1750 | 1 |
| 1759 | 1 |
| 47 | 1 |
| 48 | Ehebr |
| 49 | 1479977045596.jpg |
+------+-------------------+
10 rows in set (0.00 sec)