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create sequence seq_test start with 3 increment by 1 minvalue 1 --范围-(1027 -1) maxvalue 999999999999999999999999999 ; --范围1028-1 先 seq_test.nextval ,后 阅读全文
posted @ 2014-12-20 21:44
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ALL If you specify ALL, the default value, then the database evaluates each WHEN clause regardless of the results of the evaluation of any other WHEN 阅读全文
posted @ 2014-12-20 20:20
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TRUNCATE TABLE [schema.] table [ {PRESERVE | PURGE} MATERIALIZED VIEW LOG ] [ {DROP [ ALL ] | REUSE} STORAGE ] ; STORAGE Clauses The STORAGE clauses l 阅读全文
posted @ 2014-12-20 14:40
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CREATE [ SHARED ] [ PUBLIC ] DATABASE LINK dblink [ CONNECT TO { CURRENT_USER | user IDENTIFIED BY password [ dblink_authentication ] } | dblink_authe 阅读全文
posted @ 2014-12-20 13:39
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