Indexes. They're one of the most powerful and misunderstood aspects of SQL performance. In this post we'll look at the purpose of an index, how to create and choose choose your index type. Then finish with a di
You can also remove columns from the output usingSQL macros.These enable you to create query templatesyou can pass tables to at runtime. So – unlike the PTF where you're excluding columns – you're building up a list of the columns you want to include. When iterating through the table...
Querying Data at a Point in Time (Flashback Query)Although some Oracle tools and applications simplify or mask the use of SQL, all database operations are performed using SQL, to take advantage of the security and data integrity features built into Oracle.Overview...
Oracle SQL Developer allows a user to save their passwords for their Oracle database connections. I don’t want to continue the ‘is it bad to save passwords’ debate, but I will share a ‘trick’ for making some of you a bit happier. Just add the following line to your ‘sqldeveloper...
Updated: Nov 2009 for SQL Developer 2.1 1. Introduction Oracle SQL Developer provides a SQL Worksheet that you can use to update data, by writing simple or complex SQL statements. In this How-To, we look at the most basic of these, inserting a record, updating single and multiple records...
JIRA applications attempt to connect to the Oracle database and fail, throwing ajava.sql.SQLSyntaxErrorException. This will prevent JIRA applications from starting up. The following appears in theatlassian-jira.log: 1232012-11-14 09:43:10,746 main INFO [...
“Unable to enlist in the transaction” with Oracle linked server from MS SQL Server [<Name of Missing Index, sysname,>] in non clustered index [Execute SQL Task] Error: The value type (__ComObject) can only be converted to variables of type Object. [ODBC Driver Manager] Data source ...
I have one statement running fine in TEST db but not in PROD db, so I am planning to transfer execution plan of one of my query from TEST db to PROD db. For this I am reffering 'Import/Export SQL Tuning Sets and SQL Profiles' of following page :http://download.oracle.com/docs/cd...
TheONLYway to get a specific orderisto use an ORDER BY. http://stackoverflow.com/questions/20186673/in-oracle-11g-how-to-change-the-order-of-the-results-of-a-sql-without-order-by rowid是标识行的唯一性,格式:data object number(6个字符)+relative file number(...
Block selection, works with the keyboard and mouse in SQL Developer There’s No Trick, But You Do Have to Enable It The default behavior is to do a normal ‘wrapping’ selection of text. You can disable this under the Edit menu.