Investors worried about the financials of the technology giant’s cloud computing business, compounding broader worries about a sky-high stock boom. By Andrew Ross Sorkin Bernhard Warner Sarah Kessler ...

SCHED_NAME VARCHAR2(120) DEFAULT 'OCS_SCHEDULER' NOT NULL, IS_NONCONCURRENT VARCHAR2(1) default 'N' NOT NULL, IS_UPDATE_DATA VARCHAR2(1) default 'N' NOT NULL, CONSTRAINT POLL_JOB_DETAILS_PK PRIMARY ...

缺省情况下，当 ALTER TABLE 语句的 ADD CONSTRAINT 或 MODIFY 选项包含 REFERENCES 关键字以定义一个外键约束时，数据库服务器自动验证启用的引用约束。如果被引 用表的列（列组）上已经含有与引用约束的键对应的唯一索引或主键约束，则在外键约束验证期 间，您可能 ...

create table aud_bak tablespace TSP_AUDBAK as select * from aud$; select * from dual@dblink_aud; alter tablespace TSP_AUDBAK add datafile '+DATA' size 32g; alter tablespace TSP_AUDBAK add datafile ...

Summary: The `ALTER TABLE ... ADD CONSTRAINT ... UNIQUE` command creates a secondary index for specified field. Index type should be `lsm` for YB tables or `btree` for postgres temp tables.

Today, we are making available a new version of SQL Server Migration Assistant (SSMA), a free tool to help customers migrate their existing Oracle databases to SQL Server 2014. Microsoft released SQL ...

Oracle's namesake database management system has a data type called a CLOB, or Character Large OBject. Though the standard character data type, called CHAR, has a size limit of 2,000 characters, you ...

PL/SQL 过程已成功完成。 SQL> delete from t where rownum<20000; 已删除19999行。 SQL> commit; 提交完成。 SQL> alter table t deallocate unused keep 0; 表已更改。 Last Used Ext FileId.....1 Last Used Ext BlockId.....66441 Last ...