Developed by IBM way back in 1970, SQL is the standard programming language for handling databases. It has different types of commands to handle database queries. The major types are:DDLDDL stands for Data Definition Language. The various commands in the language are used for defining the ...
So far we have discussed all the five categories of SQL Commands i.e DCL, DML, DDL, TCL and DQL and it’s subtypes. We’ve gone through each command in detail with its syntax and example that will assist you in writing queries. The SQL commands’ allows you to construct and manipulate...
SQL> exec dbms_stats.gather_index_stats(ownname=>null,indname=>'ZIGGY_CODE_I'); PL/SQL procedure successfully completed. SQL> select partition_name, num_rows, clustering_factor from dba_ind_partitions where index_name='ZIGGY_CODE_I'; PARTITION_NAME NUM_ROWS CLUSTERING_FACTOR --- --- -...
· Insignificant whitespace is generally ignored in SQL statements and queries, making it easier to format SQL code for readability. sql语言被细分为几个语言元素,其中包括: · 条款这是语句和查询的组成部分。(在某些情况下,这些是可选的)[19] · 表达它可以产生标量值,或表由柱和行数据 · 谓词指定...
To discover which objects are not maintained by SQL Apply, you must run two queries. The first query is as follows: Copy SQL> SELECT OWNER FROM DBA_LOGSTDBY_SKIP WHERE STATEMENT_OPT = 'INTERNAL SCHEMA'; This returns all schemas that are considered to be internal. User tables...
max_tasks_in_queue:分布式DDL队列中可以保留的最大记录数,默认为1000条。 将以上参数加入config.xml的<distributed_ddl>一节即可。 <distributed_ddl><!-- Path in ZooKeeper to queue with DDL queries --><path>/clickhouse/task_queue/ddl</path><cleanup_delay_period>60</cleanup_delay_period><task_max...
SELECTDBMS_METADATA.GET_DDL('TABLE','" + tableName + "','" + alternative_schema + "')FROMdual; and It is working fine. To execute above queries oracle userneed following grants GRANTSELECT_CATALOG_ROLETOjohn;GRANTSELECTANYTABLETOjohn; ...