1. ²éѯÊý¾Ý¿âÏÖÔڵıí¿Õ¼ä
select tablespace_name, file_name, sum(bytes)/1024/1024 table_size from dba_data_files group by tablespace_name,file_name;
2. ½¨Á¢±í¿Õ¼ä
CREATE TABLESPACE data01 DATAFILE '/oracle/oradata/db/DATA01.dbf' SIZE 500M;
3.ɾ³ý±í¿Õ¼ä
DROP TABLESPACE data01 INCLUDING CONTENTS AND DATAFILES;
4. Ð޸ıí¿Õ¼ä´óС
alter database datafile '/path/NADDate05.dbf' resize 100M
5.Ôö¼ÓÊý¾ÝÎļþ
ALTER TABLESPACE NEWCCS ADD DATAFILE '/u03/oradata/newccs/newccs04.dbf' SIZE 4896M;
6. ɾ³ýÊý¾ÝÎļþ
sql>alter database datafile '/path/NADDate05.dbf' OFFLINE DROP;
±¾ÎÄÀ´×ÔCSDN²©¿Í£ºhttp://blog.csdn.net/tianlesoftware/archive/2009/10/17/4681973.aspx ......
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create or replace procedure split(
i_PageIds in varchar2, --ÔÒ³ÃæpageId×飬ÒÔ×Ö·û´®ÐÎʽ´«Èë,È磺1001,1511,
i_PageIdsCount in number --pag ......
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insert into t values('i'||chr(39)||'m'); -- chr(39)´ú±í×Ö·û'
»òÕßÓÃÁ½¸öµ¥ÒýºÅ±íʾһ¸ö
or insert into t values('I''m'); -- Á½¸ö''¿ÉÒÔ±íʾһ¸ö'
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select * from (select * from tablename order by dbms_random.value) where rownum< N;
×¢£ºdbms_random°üÐèÒªÊÖ¹¤°²×°£¬Î»ÓÚ$ORACLE_HOME/rdbms/admin/dbmsrand.sql
dbms_random.value(100,200)¿ÉÒÔ²úÉú100µ½200·¶Î§µÄËæ»úÊý
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[A]select * from table t1 where t1.rowid !=
(select max(rowid) from table t2
where t1.id=t2.id and t1.name=t2.name)
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select count(*), t.col_a,t.col_b from table t
group by col_a,col_b
having count(*)>1
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pragma autonomous_transaction;
……
commit|rollback;
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update EMPLOYEE set BADGE=trim(BADGE); // ÕâÑù¿ÉÈ¥³ý×Ö·û´®Á½±ßµÄ¿Õ¸ñ
update EMPLOYEE set BADGE=replace(BADGE,' ',''); // ÕâÑùÄÜÈ¥³ýËùÓеĿոñ
SELECT replace(string,chr(13),'') from DUAL ----»»ÐÐ
SELECT replace(string,chr(10),'') from DUAL ---»Ø³µÊÇchr(10) ......
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1¡¢substr(string string, int a, int b)
²ÎÊý1:string Òª´¦ÀíµÄ×Ö·û´®
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substr("ABCDEFG", 0); //·µ»Ø£ºABCDEFG£¬½ØÈ¡ËùÓÐ×Ö·û
substr("ABCDEFG", 2); //·µ»Ø£ºCDEFG£¬½ØÈ¡´ÓC¿ªÊ¼Ö®ºóËùÓÐ×Ö·û
substr("ABCDEFG", 1, 3); //·µ»Ø£ºABC£¬½ØÈ¡´ÓA¿ªÊ¼3¸ö×Ö·û £¬ÕâÀ↑ʼÊÇ1ºÍ3·µ»Ø¶¼ÊÇÒ»¸ö×Ö·û´®
substr("ABCDEFG", 1, 100); //·µ»Ø£ºABCDEFG£¬100ËäÈ»³¬³öÔ¤´¦ÀíµÄ×Ö·û´®×¶È£¬µ«²»»áÓ°Ïì·µ»Ø½á¹û£¬ÏµÍ³°´Ô¤´¦Àí×Ö·û´®×î´óÊýÁ¿·µ»Ø¡£
substr("ABCDEFG", 0, -3); //·µ»Ø£ºEFG£¬×¢Òâ²ÎÊý-3£¬Îª¸ºÖµÊ±±íʾ´Óβ²¿¿ªÊ¼ËãÆð£¬×Ö·û´®ÅÅÁÐλÖò»±ä¡£
2¡¢substr(string string, int a)
²ÎÊý1:string Òª´¦ÀíµÄ×Ö·û´®
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substr("ABCDEFG", 0); //·µ»Ø£ºABCDEFG, ½ØÈ¡ËùÓÐ×Ö·û
substr("ABCDEFG", 2); //·µ»Ø£ºCDEFG£¬½ØÈ¡´ÓC¿ªÊ¼Ö®ºóËùÓÐ×Ö·û
1.instr
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1. È¡A±íµÄÊý¾Ý£¬¸üÐÂB±í×Ö¶Î
update m_build b
set b.district_id=(
select d.district_id
from
bjhouse.d_district d
where
b.build_name_jq=d.district_name)
where exists
(select 1
from
bjhouse.d_district d
where
b.build_name_jq=d.district_name)
......