1. DEMO: SELECT REGEXP_SUBSTR('1,2', '[^,]+', 1, LEVEL)          FROM DUAL        CONNECT BY REGEXP_SUBSTR('1,2', '[^,]+', 1, LEVEL) IS NOT NULL 2.应用场景,具体看业务需求 select to_char(wm_concat(f.title))  from (select 1 id, '短信' title          from dual      …

文章目录 Oracle中的列转行实现字段拼接 场景 在SQL使用过程中经常有这种需求:将某列字段拼接成in('XX','XX','XX','XX','XX','XX' ...)做为查询条件. 实现 select 'in ('''||replace(wm_concat(EMPNO),',',''',''')||''')' from EMP 总结 两端字符的拼接 这里用'in ('''和''')'分别实现了in ('和')的前后拼接,以''')'为例,其中第一个第四个'是Oracle中的字符串连接符…

oracle中字符串连接用|| create or replace procedure testIf(idid number) is v_name stu.name%type; v_age stu.age%type; begin then update stu where id = idid; select age into v_age from stu where id = idid; dbms_output.put_line('age'||v_age);--oracle中字符串连接用|| e…

ORACLE 常用字符函数1 ASCII(arg1)返回参数arg1的十进制数字表示.如果数据库设置为ASCII,则采用的是ASCII码字符.如果设置为EBCDIC,则采用的是EBCDIC字符 select ascii('A') from dual; ASCII('A')---------- 65 2 CHR(arg1,[using nchar_cs])返回由参数arg1的代码所指定的字符.所返回的字符依赖于oracle所使用的底层字符编码设置. select chr(65) from dual…

1. Oracle自带列转行函数listagg: 实例: with temp as( select 'China' nation ,'Guangzhou' city from dual union all select 'China' nation ,'Shanghai' city from dual union all select 'China' nation ,'Beijing' city from dual union all select 'USA' nation ,'New York…

ALTER DATABASE character set INTERNAL_USE ZHS16GBK;  ALTER DATABASE CHARACTER SET ZHS16GBK;  oracle修改字符编码    1 1    打开命令窗口    2 2    查看当前字符编码    3 3    执行命令    4 oracle修改字符编码 打开命令窗口 sqlplus shybt/shybt@localhost:1521/orcl 查看当前字符编码 select userenv('lan…

from:http://blog.csdn.net/chid/article/details/6166506 Linux 下更改 oracle 客户端字符集和服务端字符集 1.Linux 下更改 oracle 客户端字符集,即设置环境变量“ NLS_LANG“ 的值 查看客户端字符集,在终端下执行: echo $NLS_LANG 修改客户端字符集: sudo gedit /etc/environment 在environment 文件中增加以下内容: NLS_LANG="SIMPLIFIED C…

oracle查看字符集和修改字符集 : 查看数据库服务器的字符集: select userenv('language') from dual ; 登陆用dba: 停掉数据库 : shutdown immediate; 启动数据库到mount状态下 : STARTUP MOUNT; ALTER SESSION SET SQL_TRACE=TRUE; ALTER SYSTEM ENABLE RESTRICTED SESSION; ; ; 启动数据库 : Alter database open 设置字…

Oracle 切割字符查询 select * from view_psbaseinfo where DECODE('410782001125,411100000043', '', NULL, '410782001125,411100000043') IS NULL or PSCODE in (SELECT REGEXP_SUBSTR('410782001125,411100000043', '[^,]+', 1, LEVEL) AS PSCODE FROM DUAL CONNECT BY LEV…

DECLARE M ); BEGIN FOR I IN ( WITH T AS (SELECT REVERSE('i,am,a,test,hahahhah') AS STR FROM DUAL) SELECT LEVEL, REGEXP_SUBSTR(T., LEVEL) STR_SINGLE FROM T CONNECT ) LOOP SELECT REVERSE(I.STR_SINGLE) INTO M FROM DUAL; DBMS_OUTPUT.PUT_LINE(M); END LOOP…