Question

我正在重新创建Oracle中SQL Server中存在的数据库。我是DDL的新手，也是Oracle的新手。我在SQL Server中遇到了下表

CREATE TABLE [DailyCounts](
    [LDate] [datetime] NOT NULL CONSTRAINT [DF_LDate]  DEFAULT (getdate()),
    [SourceTable] [varchar](32) NOT NULL,
    [TableRowCount] [bigint] NOT NULL,
 CONSTRAINT [PK_DailyCounts] PRIMARY KEY CLUSTERED 
(
    [LDate] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON, FILLFACTOR = 80) ON [PRIMARY]
) ON [PRIMARY]

该表存储数据库中每个大表的每日行数约4个表（每天4行）。

Oracle中上表的等效表定义是什么，尤其是Oracle中index options的等价表？我对索引选项一无所知，在这种情况下是否需要它们。

CONSTRAINT [PK_DailyCounts] PRIMARY KEY CLUSTERED 
(
    [LDate] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON, FILLFACTOR = 80) ON [PRIMARY]
) ON [PRIMARY]

我知道上述查询not required中的ON PRIMARY为Oracle doesn't have clustered indexes，而Oracle创建了indexes for primary keys。因此，我个人觉得以下查询应该可以胜任。

CREATE TABLE DailyCounts(
    LDate timestamp DEFAULT sysdate CONSTRAINT PK_DailyCounts PRIMARY KEY,
    SourceTable varchar2(32) NOT NULL,
    TableRowCount number(19) NOT NULL
 );

Oracle中等效的索引选项（SQL Server）

0 个答案: