Oracle Database provides a number of built-in data types as well as several categories for user-defined types that can be used as data types. The syntax of Oracle data types appears in the diagrams that follow. The text of this section is divided into the following sections: Oracle Built-...
Note:A detailed deadlock event monitor is created for each newly created database. This event monitor, named DB2DETAILDEADLOCK, starts when the database is activated and will write to files in the database directory. You can avoid the additional processor time this event monitor requires by dr...
Data greater than 4000 bytes are always stored externally and you can specify different tablespace and storage characteristics StandardsOracle Extension Oracle NCLOB - Equivalents in Other Databases DatabaseData Type and Conversion SQL ServerNVARCHAR(n | max), 1 ⇐ n ⇐ 4000, 2G ifmaxis specified...
The storage size is the actual length of the data entered + 2 bytes. The data that is entered can be 0 bytes in length. The ANSI SQL synonym for varbinary is binary varying.nchar [ ( n ) ]Fixed-length Unicode string data. n defines the string length and must be a value from 1 ...
DPAG表空间中的 Db2 页面 (DPAG) 锁定。 程序读取数据或更新数据时,将获取包含数据的页面锁定。 DB = 数据库名称 PS = 页集名称 PG = 页面 DSET分区锁定。 分区表空间包含一个或多个分区(最多 64 个)。 将在使用 SQL CREATE TABLESPACE 语句以及 NUMPARTS 参数创建表空间时进行创建。
DBF Oracle 8.x Tablespace File DBF ACT! Main Database File (Best Software CRM Division) DBG Paradox File DBG Watcom Debugger Script DBG PFE File DBG ArcView Problem Debug Log File (ESRI) DBG C++ Symbolic Debugging Info (Borland Software Corporation) DBG Debugger Script Watcom Debugger DBG MS ...
postgres=# CREATE INDEX my_index ON product USING btree (name) TABLESPACE pg_default; CREATE INDEX postgres=# explain select name from product; Seq Scan on product (cost=0.00..24.08 rows=1408 width=24) postgres=# explain select /*+ indexonlyscan(product my_index) */ name from product...
ラージ・オブジェクト (LOB) という用語は、CLOB、DBCLOB、または BLOB のいずれかのデータ・タイプを表します。
表格空間中的 Db2 頁面 (DPAG) 鎖定。 當程式讀取資料或更新資料時,它們會獲得含有資料的頁面鎖定。 DB = 資料庫名稱 PS = 頁集名稱 PG = 頁面 DSET 分割的鎖定。 分割的表格空間含有一個以上的分割區(最多 64 個)。 當您搭配使用 SQL CREATE TABLESPACE 陳述式與 NUMPARTS 參數來建立表格空間時,即會建...