Oracle中的NOLOGGING属性详解 1. 解释什么是Oracle中的NOLOGGING属性 在Oracle数据库中,NOLOGGING属性是一种用于减少日志生成的选项。默认情况下,Oracle数据库在DML(数据操纵语言,如INSERT、UPDATE、DELETE)操作、DDL(数据定义语言,如CREATE TABLE、ALTER TABLE)操作以及某些其他操作时,会生成重做日志(redo logs)和归档日...
table_properties::= 図table_properties.epsの説明 (column_properties::=、read_only_clause::=、indexing_clause::=、table_partitioning_clauses::=、attribute_clustering_clause::=、parallel_clause::=、enable_disable_clause::=、row_movement_clause::=、flashback_archive_clause::=、subquery::=) col...
you enable basic table compression. Oracle Database attempts to compress data during direct-path INSERT operations when it is productive to do so. The original import utility (imp) does not support direct-path INSERT, and therefore cannot import data in a compressed format. ...
oracle 构建索引index_logging_nologging SQL> create table t_index(a int,b int); Table created. SQL> create index idx_t_index on t_index(a); Index created. SQL> select index_name,logging,status from user_indexes where table_name='T_INDE X'; INDEX_NAME LOGGING STATUS --- --- --- ...
Temporary tables cannot contain columns of nested table or varray type. You cannot specify the following clauses of the LOB_storage_clause: TABLESPACE, storage_clause, LOGGING or NOLOGGING, MONITORING or NOMONITORING, or LOB_index_clause. Parallel DML and parallel queries are not supported for...
CREATE TABLE 删除if CREATE [TEMPORARY] TABLE [IF NOT EXISTS] tbl_name select_statement 对于create table as 语句,openGauss 不支持使用 if not exists 判断,因此会删除 if 判断。 列约束 语法:column_definition: col_name type [NOT NULL | NULL] [DEFAULT default_value] [AUTO_INCREMENT] [UNIQUE [KE...
... into ，但是可以使用 insert into ... select 当然也可以使用 create table <new table> ...
C.PARALLEL D.COMPRESS E.NOLOGGING F.COMPUTESTATISTICS 点击查看答案 第6题 YouworkasadatabaseadministratorforCertkiller.com.Yoususpectthatinoneofyourapplicationsthec ustomertableisbeingaccessedbysomeunauthorizedusers.Whichoptionwouldyouusetomonitorthequeriesbeingexecutedonthecustomertable?() A.Monitorthealert....
table_name The name (optionally schema-qualified) of the table to be created. Please note that the table name is limited to a maximum of 31 characters in length when creating a partition table in oracle mode. table_comment The contents of comment for the table to be created. ...
CREATE TABLE 删除if CREATE [TEMPORARY] TABLE [IF NOT EXISTS] tbl_name select_statement 对于create table as 语句,openGauss 不支持使用 if not exists 判断,因此会删除 if 判断。 列约束 语法:column_definition: col_name type [NOT NULL | NULL] [DEFAULT default_value] [AUTO_INCREMENT] [UNIQUE [KE...