在sqlyog中查看mysql的表结构 1、查看标的创建语句SHOW CREATETABLEtable_name; 2、简单查看表结构DESCtable_name; 3、查询表结构详细信息——包括列注释 5、查看表的信息 [20131121]12c sqlplus的set colinvisible on.txt user_tab_columnswheretable_name='T'; COLUMN_ID COLUMN_NAME--- --- 1 A B 2 C...
您没有指定使用哪个数据库;在Oracle 11 g上，可以查询dictionary视图，该视图包含所有 * 系统视图 * 的...
但是就有这样的矛盾存在:在内存资源有限的情况下,某些时候数据被cache的需求非常大,为了提高buffer hit,就需要增加Buffer Cache,但由于SGA有限,只能从其他区“抢”过来——如缩小Shared Pool,增加Buffer Cache;而有时又有大块的PLSQL代码被解析驻入内存中,导致Shared Pool不足,甚至出现4031错误,又需要扩大Shared Pool...
ORA-17174 The only supported namespace is CLIENTCONTEXT 唯一受支持的名称空间是 CLIENTCONTEXT。 ORA-17175 Error during remote ONS configuration 配置远程 ONS 期间出错。 ORA-17259 SQLXML cannot find the XML support jar file in the classpath SQLXML 在类路径中找不到 XML 支持的 jar 文件。 ORA-172...
Steps: === 1) Execute below query to find the constraint name: 执行下面的查询来找到约束名: SQL> select owner, constraint_name,table_name,index_owner,index_name from dba_constraints where (index_owner,index_name) in (select owner,index_name from dba_indexes where tablespace_name='<tablespace...
–WHERE table_name = :tname AND table_owner = :towner ORDER BY partition_position 12、查看还没提交的事务 select * from v$locked_object; select * from v$transaction; 13、查找object为哪些进程所用 select p.spid, s.sid, s.serial# serial_num, ...
Oracle 递归sql,mybatis的递归查询,与存储过程调用 Oralce 递归sql 一、查询所有子节点 SELECT * FROM district START WITH NAME ='平昌县' CONNECT BY PRIOR parent_id=ID...二、查询所有父节点 SELECT * FROM district START WITH NAME ='平昌县' CONNECT BY PRIOR parent_id=ID 这个语法很好理解,就是递归...
A. All columns with character datatypes accessible to the current user select owner as schema_name, table_name, column_id, column_name, data_type, data_length from sys.all_tab_cols where data_type in ('CHAR', 'VARCHAR', 'VARCHAR2', 'NCHAR', 'NVARCHAR2', 'CLOB', 'NCLOB') and owne...
Support SAAS complete application: cross-database query, audit, tenant sub-database, tenant sub-table and tenant data isolation Support low code + workflow (dynamic class building, dynamic table building, non-entity multi-library compatible with CRUD, JSON TO SQL, custom XML, etc.) Support Valu...
Column name alias with space : Alias « Query Select « Oracle PL/SQL Tutorial SQL> SQL> SQL> SQL> create table employees( 2 empno NUMBER(4) 3 , ename VARCHAR2(8) 4 , init VARCHAR2(5) 5 , job VARCHAR2(8) 6 , mgr NUMBER(4) 7 , bdate DATE 8 , msal NUMBER(6,2) 9 ,...