Ò׽ؽØÍ¼Èí¼þ¡¢µ¥Îļþ¡¢Ãâ°²×°¡¢´¿ÂÌÉ«¡¢½ö160KB

SQL*PLUSÖк¯Êý

´´½¨º¯Êý
CREATE OR REPLACE FUNCTION ntfuc(inp IN NUMBER)
RETURN NUMBER
IS
ntmp NUMBER;
BEGIN
ntmp := inp;
RETURN ntmp;
END ntfuc;
/
Ö´Ðиú¯Êýʱ
DECLARE
rcn NUMBER;
BEGIN
rcn := ntfunc(1);
END;
/


Ïà¹ØÎĵµ£º

oracle dba ³£ÓÃsql語¾ä

³£ÓÃSQL²éѯ£º
 
1¡¢²é¿´±í¿Õ¼äµÄÃû³Æ¼°´óС
 
select t.tablespace_name, round(sum(bytes/(1024*1024)),0) ts_size
from dba_tablespaces t, dba_data_files d
where t.tablespace_name = d.tablespace_name
group by t.tablespace_name;
 
2¡¢²é¿´±í¿Õ¼äÎïÀíÎļþµÄÃû³Æ¼°´óС
 
select t ......

SQLÓû§È¨ÏÞ¹ÜÀí·þÎñÆ÷

Óû§È¨ÏÞ¹ÜÀí
Ò»¡¢·þÎñÆ÷µÇ¼ÕʺźÍÓû§ÕʺŹÜÀí
1.SQL Server·þÎñÆ÷µÇ¼¹ÜÀí
²»¹ÜʹÓÃÄÄÖÖÈÏ֤ģʽ£¬Óû§¶¼±ØÐëÏȾ߱¸ÓÐЧµÄÓû§µÇ¼Õʺš£SQL ServerÓÐÈý¸öĬÈϵÄÓû§µÇ¼Õʺţº¼´sa¡¢Builtin\administratorsºÍguest¡£saÊÇϵͳ¹ÜÀíÔ±(system administrator)µÄ¼ò³Æ£¬ÊÇÒ»¸öÌØÊâµÄÓû§£¬ÔÚSQL ServerϵͳºÍËùÓÐÊý¾Ý¿âÖÐÓ ......

SQL UNION ºÍUNION ALL ²Ù×÷·û


SQL UNION ²Ù×÷·û
UNION ²Ù×÷·ûÓÃÓںϲ¢Á½¸ö»ò¶à¸ö SELECT Óï¾äµÄ½á¹û¼¯¡£
Çë×¢Ò⣬UNION ÄÚ²¿µÄ SELECT Óï¾ä±ØÐëÓµÓÐÏàͬÊýÁ¿µÄÁС£ÁÐÒ²±ØÐëÓµÓÐÏàËÆµÄÊý¾ÝÀàÐÍ¡£Í¬Ê±£¬Ã¿Ìõ SELECT Óï¾äÖеÄÁеÄ˳Ðò±ØÐëÏàͬ¡£
SQL UNION Óï·¨
SELECT column_name(s) from table_name1
UNION
SELECT column_name(s) from table_na ......

sql ³£Óú¯Êý

SQL³£ÓÃ×Ö·û´®º¯Êý
Ò»¡¢×Ö·ûת»»º¯Êý
1¡¢ASCII()
·µ»Ø×Ö·û±í´ïʽ×î×ó¶Ë×Ö·ûµÄASCII ÂëÖµ¡£ÔÚASCII£¨£©º¯ÊýÖУ¬´¿Êý×ÖµÄ×Ö·û´®¿É²»ÓÑ’À¨ÆðÀ´£¬µ«º¬ÆäËü×Ö·ûµÄ×Ö·û´®±ØÐëÓÑ’À¨ÆðÀ´Ê¹Ó㬷ñÔò»á³ö´í¡£
2¡¢CHAR()
½«ASCII Âëת»»Îª×Ö·û¡£Èç¹ûûÓÐÊäÈë0 ~ 255 Ö®¼ä ......

SQL ³£ÓÃÓï¾äÒÔ¼°º¯Êý

SQL ³£ÓÃÓï¾äÒÔ¼°º¯ÊýÖ®Ò» 
SELECT --´ÓÊý¾Ý¿â±íÖмìË÷Êý¾ÝÐкÍÁÐ
¡¡¡¡¡¡¡¡¡¡¡¡INSERT --ÏòÊý¾Ý¿â±íÌí¼ÓÐÂÊý¾ÝÐÐ
¡¡¡¡¡¡¡¡¡¡¡¡DELETE --´ÓÊý¾Ý¿â±íÖÐɾ³ýÊý¾ÝÐÐ
¡¡¡¡¡¡¡¡¡¡¡¡UPDATE --¸üÐÂÊý¾Ý¿â±íÖеÄÊý¾Ý
¡¡¡¡--Êý¾Ý¶¨Òå
¡¡¡¡ CREATE TABLE --´´½¨Ò»¸öÊý¾Ý¿â±í
¡¡¡¡¡¡¡¡¡¡¡¡DROP TABLE --´ÓÊý¾Ý¿âÖÐɾ³ý±í
......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ