Oracle/PLSQL will assume that everything after the/*symbol is a comment until it reaches the*/symbol, even if it spans multiple lines within the SQL statement. So in this example, the SQL comment will span across 2 lines.
Hints were introduced in Oracle7, when users had little recourse if the optimizer generated suboptimal plans. Now Oracle provides a number of tools, including the SQL Tuning Advisor, SQL plan management, and SQL Performance Analyzer, to help you address performance problems that are not solved by...
ArcGIS Pro 3.0.3; mobile geodatabase: I want to put SQL comments in definition query SQL expressions. From my testing, these kinds of comments seem to work as
oracle mybatis生成器java.lang.ClassNotFoundException: oracle.jdbc.driver.OracleDriver 、、 我正在尝试在IDEA中与oracle建立一个SSM项目。我刚接触oracle,在使用MyBatis生成器从oracle生成表时遇到问题。我可以使用SQL从我的数据库中获取数据,但是当我尝试生成它时,我得到了错误java.lang.ClassNotFoundExcepti...
Oracle SQL Developer also color codes any comments (inline or multi-line) and displays them in a light gray. This makes it easy to locate comments and commented-out code (and can also help you find code that you no longer want commented out)....
Comments within SQL statements can make your application easier to read and maintain. A comment can be placed between any keywords, parameters, or punctuation marks in a statement. For example, you can add a comment in a statement to describe the purpose of the statement in your application. ...
Oracle Database Gateway for SQL ServerのUSER_COL_COMMENTSデータ・ディクショナリ。 名前タイプ値 TABLE_NAME VARCHAR2(256) - COLUMN_NAME VARCHAR2(256) - COMMENTS VARCHAR2(1) NULL 親トピック: データ・ディクショナリ 前...
一. Oracle 触发器 什么是触发器 监听器:监听表中的数据是否发生了改变(insert ,update ,delete) 监听器语法 create or replace trigger 触发器名称 before | after --在改变之前或之后执行触发器 insert | update | delete --监听哪一个动作 on 表名 – 监听哪一张表 触发器的级别 表级触发...猜...
Oracle Database Backup Service - Version N/A and laterInformation in this document applies to any platform.SymptomsWhile running a full DataPump job, the errors below are hit when processing the comments:...Processing object type DATABASE_EXPORT/SCHEMA/VIEW/COMMENTORA-39126: Worker unexpected ...
In this case, MySQL Server parses and executes the code within the comment as it would any other SQL statement, but other SQL servers ignore the extensions. For example, MySQL Server recognizes theSTRAIGHT_JOINkeyword in the following statement, but other servers do not: ...