利用数据库将字符串分割成Table函数

1、Oracle中

创建代码：

create or replace type t_SplitTable as object(  id       integer,  valueStr varchar2(8000));

create or replace type t_Split_Table as table of t_SplitTable;

create or replace function Fun_SplitByDot(p_str varchar2, p_char varchar2) return t_Split_Table as v_table t_Split_Table := t_Split_Table();v_num_id integer; v_var_data varchar2(2000); v_num_index integer; beginselect nvl(p_str, '') into v_var_data from dual; if length(v_var_data) = 0 then return v_table; --字符长度为0 ，退出end if;v_num_id := 1;select instr(v_var_data, p_char) into v_num_index from dual; while(v_num_index > 0) loopv_table.extend(); v_table(v_table.count) := t_SplitTable(v_num_id, substr(v_var_data, 0, v_num_index - 1));v_num_id := v_num_id + 1; select substr(v_var_data, v_num_index + 1, length(v_var_data) - v_num_index) into v_var_data from dual; select instr(v_var_data, p_char) into v_num_index from dual; end loop; if length(v_var_data) > 0 then v_table.extend(); v_table(v_table.count) := t_SplitTable(v_num_id, v_var_data); end if;return v_table;end Fun_SplitByDot;

查询：

select * from table(fun_splitbydot('a,2000001481,c',','));

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2、SqlServer

创建代码：

CREATE FUNCTION StringToTable(@StringX varchar(8000),@Split nvarchar(10))RETURNS @TableResult TABLE(TableID nvarchar(20))ASBEGINDECLARE @Index intDECLARE @LenIndex intSELECT @LenIndex=LEN(@Split),@Index=CHARINDEX(@Split,@StringX,1)WHILE (@Index>=1)BEGININSERT INTO @TableResult SELECT LEFT(@StringX,@Index-1)SELECT@StringX=RIGHT(@StringX,LEN(@StringX)-@Index-@LenIndex+1),@Index=CHARINDEX(@Split,@StringX,1)ENDIF(@StringX<>'') INSERT INTO @TableResult SELECT @StringXRETURNEND

?查询：

select * from StringToTable('01__02__03','__') 

3、MySql

创建代码：

# 函数：func_split_TotalLength DROP function IF EXISTS `func_split_TotalLength` ;CREATE FUNCTION `func_split_TotalLength` (f_string varchar(1000),f_delimiter varchar(5)) RETURNS int(11) BEGIN     # 计算传入字符串的总length     return 1+(length(f_string) - length(replace(f_string,f_delimiter,''))); END;

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# 函数：func_split DROP function IF EXISTS `func_split` ;CREATE FUNCTION `func_split` (f_string varchar(1000),f_delimiter varchar(5),f_order int) RETURNS varchar(255) CHARSET utf8 BEGIN     # 拆分传入的字符串，返回拆分后的新字符串         declare result varchar(255) default '';         set result = reverse(substring_index(reverse(substring_index(f_string,f_delimiter,f_order)),f_delimiter,1));         return result; END;

# 存储过程：splitString DROP PROCEDURE IF EXISTS `splitString` ;CREATE PROCEDURE `splitString` (IN f_string varchar(1000),IN f_delimiter varchar(5)) BEGIN # 拆分结果 declare cnt int default 0; declare i int default 0; set cnt = func_split_TotalLength(f_string,f_delimiter); DROP TABLE IF EXISTS `tmp_split`; create temporary table `tmp_split` (`status` varchar(128) not null) DEFAULT CHARSET=utf8; while i < cnt do     set i = i + 1;     insert into tmp_split(`status`) values (func_split(f_string,f_delimiter,i)); end while; END;

查询代码：

#测试是否能成功分割#call splitString("apple,banana,orange,pears,grape",","); #select * from tmp_split; 

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