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ceil(number) ´óÓÚ»òµÈÓÚµÄ×îСÕûÊý
floor(number) СÓÚ»òµÈÓÚµÄ×î´óÕûÊý
trunc(number,m) ÔÚÕûÊýnumberµÄmλÖýصôm¼°ÒÔºóµÄλÊý:
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trunc(15.78,-1)=15;
round ......
oracle constraints Ó¦ÓÃ
oracle constraints¿ÉÒÔÉèÖÃΪÁ¢¼´¼ì²é»òÕßµ±Ê±ÊÂÎñÌύʱ¼ì²é¡£
¿ÉÒÔÔÚ´´½¨Ô¼ÊøµÄʱºòÖ¸¶¨ÊÇdeferrable¡£È»ºóͨ¹ýset constraints xxx set deferred»òÕßimmediate,Ò²¿ÉÒÔÔÚseesion¼¶±ðÉ趨ËùÓÐÔ¼ÊøÎªdeferred»òÕßimmediate(alter seesion set constraints deferred/immediat ......
1. ASCII
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SQL> select ascii(A) A,ascii(a) a,ascii(0) zero,ascii( ) space from dual;
A A ZERO SPACE
--------- --------- --------- ---------
65 97 48 32
2. CHR
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SQL> select chr(54740) zhao,chr(65) chr65 from dual;
ZH C
-- -
ÕÔ A
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Oracle Workflows Access Protection Concepts
As a workflow developer, you can use access protection to allow or discourage “customers” of your workflows from modifying your “seed data” workflow definitions.
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