(2) 区:由一系列相邻的块而组成,这也是ORACLE空间分配的基本单位,举个例子来说,当创建一个表PM_USER时,首先ORACLE会分配一区的空间给 这个表,随着不断的INSERT数据到PM_USER,原来的这个区容不下插入的数据时,ORACLE是以区为单位进行扩展的,也就是说再分配多少个区给 PM_USER,而不是多少个块. (3)段:是由一系列的区
SQL Developer是目前经常使用的一款Oracle操作工具,大多数企业都使用该工具操作Oracle数据库。它比Oracle自带的企业管理器使用起来更加方便,如图4.2所示是SQL Developer主界面。 图4.2 SQL Developer主界面 通过SQL Developer工具可以很方便地操作Oracle数据库,特别对数据库对象和数据的操作是最方便的。下面就以查询BOOKINFO表...
The syntax for the TRUNCATE TABLE statement in Oracle/PLSQL is: TRUNCATE TABLE [schema_name.]table_name [ PRESERVE MATERIALIZED VIEW LOG | PURGE MATERIALIZED VIEW LOG ] [ DROP STORAGE | REUSE STORAGE ] ; Parameters or Arguments schema_name ...
In this article, we will learn how to create a table, insert records, select statements, update a statement, truncate a table and drop table statements in an oracle database. 1. Create Table Create Table statement used to create the new table in the oracle database, in the fo...
SQL> CREATE INDEX IDX_U2_T_LHR ON U2_T_LHR(DUMMY); Index created. SQL> SQL> GRANT SELECT,DELETE,UPDATE ON U2_T_LHR TO LHR_U1; Grant succeeded. 用户2创建存储过程并赋予用户1的执行权限: SQL> CREATE OR REPLACE PROCEDURE PRO_TRUNC_DROP_LHR(COMMAND IN VARCHAR2, ...
Now, we shortly describe the main differences between TRUNCATE, DELETE, and DROP in the table. Note:You should be careful with theTRUNCATE TABLEstatement. This command can delete all data permanently. Luckily,dbForge SQL Complete, which is one of the best SQL database development, management, ...
// command: // SELECT * FROM USER_CONSTRAINTS WHERE TABLE_NAME = "tabnam"; 比较清楚地说明了问题,以及解决方法:可以在执行前,先禁用外键约束,执行truncate后再恢复外键约束。 4. 禁用外键约束,删除后执行恢复操作 看到外键约束名称:FK_TBL_B_A: ...
Oracle Database11gEnterpriseEdition Release11.2.0.1.0 – Production //建立父表t SQL> create table t (id number, name varchar2(100)); Table created SQL> alter table t add constraint pk_t_id primary key (id); Table altered //建立字表m ...
SQL DELETE SQL CREATE DATABASE SQL USE DATABASE SQL ALTER DATABASE SQL DROP DATABASE SQL DATA TYPES SQL COMMAND Groups SQL CREATE TABLE SQL ALTER TABLE SQL Integrity Constrain SQL AUTO INCREMENT SQL JOINS SQL RENAME SQL VIEWS SQL Subquery SQL Indexes SQL GRANT, REVOKE Oracle Functions SQL SELE...
In DAC_SDE_ORA_BOMItemFact_ORA_R1213_DataWarehouse Task, you see the following error:executing sql (Truncate OPI:ORA_R1213) Call apps.OPI_OBIA_BOMPEXPL_WRAPPER_PKG.do_sql('TRUNCATE TABLE OPI.OPI_OBIA_W_BOM_HEADER_DS') "Truncate OPI" failed on "ORA_R1213" sql: Call apps...