【oracle】:字符串分割的函数讲解
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发布时间:2022-04-21 20:48
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时间:2023-12-29 19:25
(1)定义split_type类型:
CREATE OR REPLACE TYPE split_type IS TABLE OF VARCHAR2 (4000) /(2)定义split函数:
CREATE OR REPLACE FUNCTION split (p_str IN VARCHAR2, p_delimiter IN VARCHAR2) RETURN split_type IS j INT := 0; i INT := 1; len INT := 0; len1 INT := 0; str VARCHAR2 (4000); my_split split_type := split_type (); BEGIN len := LENGTH (p_str); len1 := LENGTH (p_delimiter); WHILE j < len LOOP j := INSTR (p_str, p_delimiter, i); IF j = 0 THEN j := len; str := SUBSTR (p_str, i); my_split.EXTEND; my_split (my_split.COUNT) := str; IF i >= len THEN EXIT; END IF; ELSE str := SUBSTR (p_str, i, j - i); i := j + len1; my_split.EXTEND; my_split (my_split.COUNT) := str; END IF; END LOOP; RETURN my_split; END split; /(3)存储过程中,使用类似
For T In ( select a,b,c,d from table (split('1,2,3,4',',')) ) Loop--注意下面的inserti语句,varchar类型的值需要补充引号上去Execute Immediate ' insert into tableName set fieldName = '||T.a ;Execute Immediate 'commit';
End Loop;
的查询语句,把分开的结果拼成sql语句并写入到表中。