For example, you may want to remove therow_numbercolumn in a top-N/group query. But if you do this in the same query block you filter it, you'll get an error: Copy code snippet Copied to Clipboard Error: Could not Copy Copied to Clipboard Error: Could not Copy with rws as ( sele...
When working with Oracle databases, there are times when you need to optimize and homogenize the database to ensure good performance. This is also known as database tuning. In most cases when tuning a database, you’ll focus on SQL query tuning. In Oracle, SQL query tuning is an importan...
So now the goal is to run a query from PL/SQL that will return that new point record while it is in that child version, and this is where I get lost. I'm using the ESRI help as a guide (http://resources.arcgis.com/en/help/main/10.1/index.html#/...
While Oracle Database can combine B-trees (via a "bitmap conversion from rowids"), this is relatively expensive. In general to get the same performance as the three bitmaps, you need to place all three columns in a single index. This affects how reusable an index is, which we'll come...
The acronym “SQL” stands for Structured Query Language, a type of programming language that’s used for manipulating data in a database. MySQL uses the SQL language to manage and query data in databases and, hence, uses the acronym as part of its name. If you’ve got data stored in ...
I want get value of two columns in DataGridView with multi select in vb.net. how to do it? Thanks all. 展開資料表 Name of Allah, Most Gracious, Most Merciful and He created the human All replies (5) Thursday, September 21, 2017 8:38 AM ✅Answered | 2 votes Hi, How about t...
conditions:It refers to the conditions which must be met to get the record deleted. Example: In this example, we will delete table’ Classmates’. Let us look at the query for the same. DROP TABLE Classmates; The screenshot below shows the query output when run on SQL developer. ...
I am using the following piece of code to retrieve the SQL to the DTO on the BLL. result.data = _dbContext.Database.SqlQuery<sysmstatusgroup_dto>(sqlFinal).ToList(); but then i get an error which says that i cannot use SqlQuery anymore on the new entity framework. Is there a...
Parameters require accordance with names of OracleParameter instances in the collection. Parameters are declared using ':' prefix followed by name of the parameter. You do not have to care about the order in which parameters are created. Parameter can appear more than once in query text, but ...
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