Oracle数据库在给表添加字段的 sql中用 comment报错 原因:不同于mysql,Oracle数据库在添加表字段时不能直接用comment,而是单独写一个sql语句,如下: alter table SYS_USER add SENDMSG_LASTTIME date; comment on column SYS_USER.SENDMSG_LASTTIME is '上一次发送
"Comments" for more information on associating comments with SQL statements and schema objects Oracle Database Reference for information on the data dictionary views that display comments Prerequisites The object about which you are adding a comment must be in your own schema or: To add a comment ...
因为你写的不是PL/SQL代码块而是SQL语句，比如你写这样的东西 select * from emp1;select * from emp1 两个语句执行，就会报ORA-00911: 无效字符 应该写这样类似的 begin execute immediate 'comment on column emp4.job is ''emp4 job''';execute immediate 'comment on column emp4.sal is ...
Comment se connecter à Oracle Database 10g Express EditionGuide pratique Ce guide explique comment utiliser Oracle SQL Developer pour se connecter à Oracle Database 10g Express Edition (XE). Démarrez Oracle SQL Developer. Dans le navigateur Connexions sur le côté gauche de l’outil, ...
Do not put a single-line comment in a PL/SQL block to be processed dynamically by an Oracle Precompiler program. The Oracle Precompiler program ignores end-of-line characters, which means that a single-line comment ends when the block ends./...
无法对 SYSIBM , SYSIBMADM , SYSFUN 或 SYSPROC 模式 (SQLSTATE 42832) 中的函数进行注释。 该注释将替换 SYSCAT.ROUTINES 目录视图。 FUNCTION MAPPINGFUNCTION-MAPPING-name 指示将为函数映射添加或替换注释。function-mapping-name必须标识当前服务器上存在的函数映射 (SQLSTATE 42704)。 注释将替换 SYSCAT.FUNCMAPP...
"Comments "for more information on associating comments with SQL statements and schema objects Oracle Database Referencefor information on the data dictionary views that display comments Prerequisites The object about which you are adding a comment must be in your own schema or: ...
SQL 语法 普通租户(Oracle 模式) SQL 语句 DDL COMMENT 更新时间:2024-01-16 09:32:11 描述 该语句将有关表或表列、视图或视图列的注释添加到数据字典中。 要从数据库中删除注释,请将其设置为空字符串''。 语法 /*为列添加注释*/COMMENTONCOLUMN[schema.]{ table_name.|view_name.} column_nameIS'stri...
Ce SGBDR d’Oracle est basé sur le langage SQL (Structured Query Language) et fonctionne sur pratiquement toutes les plates-forme, comme Linux, UNIX et Windows. MySQL est basé sur un modèle client-serveur, où le serveur MySQL gère toutes les instructions. Le but originel de ce ...
Tab is included for compatibility. Oracle recommends that you do not use this view. 这个视图可以查看当前schema下的所有的表 4.2 USER_TABLES user_tables describes the relational tables owned by the current user. Its columns (except for OWNER) are the same as those in ALL_TABLES. To gather sta...