The whole question is pretty much in the title. For each row of the table I'd like to select the maximum of a subset of columns. For example, from this table name m1 m2 m3 m4 A 1 2 3 4 B 6 3 4 5 C 1 5 2 1 the result would be name max A 4 B 6 C 5 The query must be compatible oracle 8i. Thanks. ...
How do I get this: entityid name stringvalue ----------- -------------------- -------------------- 1 ShortDescription Coal 1 LongDescription BlackCoal 1 ShortDescription Gold 1 LongDescription WhiteGold 1 ShortDescription Steel 1 LongDes...
So I want to make a program that allows you to store and search for user names/passwords for online sites there signed up to. I know C# has some database options but I don't know much about it. I also heard that it can read/write excel files. Whats do you think is best for storing the data? ALSO do databases need to be stored online o...
Sorry for an unclear question previously; hopefully I can start again... I have this data: entityid name stringvalue ----------- -------------------- -------------------- 1 ShortDescription Coal 1 LongDescription BlackCoal 1 ShortDescription Gold 1 LongDescription ...
Hi, I have few Gigabytes text file in format: {"user_ip":"x.x.x.x", "action_type":"xxx", "action_data":{"some_key":"some_value"...},...} each entry is one line. First I would like to easily find entries for given ip. This part is easy because I can use grep for example. However even for this I would like to find better solution because...
I have case where I want a database user to have db_owner privileges with regard to one databases on the server, but be able to see absolutely nothing of other databases on the server, including, for example, the sys.databases view. I have tried denying select on this view at the master database level, but this prevents the user even fr...
I'm using LinqToSql like this with a CheckBoxList in ASP.NET: var teachers = from x in dc.teachers select x; cbl.DataSource = teachers; cbl.DataTextField = "name"; cbl.DataValueField = "teacherID"; cbl.DataBind(); I want to display both "firstname" and "name" in the DataTextField however. I found this solution but I'm using ...
Hello, Is there a limit on how many records can go to a global temporary table, before it affects performance, and does it affect performance? I am talking here about millions of records that might be inserted to a global temporary table. ...
Is there a refactoring tool available for SQL (TSQL in particular). Is there any tool that can do automatic simplification of SQL? I have a set of views where only the top two are used, and I'd like to refactor this into only two views, hence 10+ queries into two queries. ...
I need to run a stored procedure on a bunch of records. The code I have now iterates through the record stored in a temp table. The stored procedure returns a table of records. I was wondering what I can do to avoid the iteration if anything. set @counter = 1 set @empnum = null set @lname = null set @fname = null --...
Anyone know a tool for generating Java class with JPA annotations from an SQL script? Batch process would be a plus since I have a large amount of sql objects. ...
SSMS allows you to right-click a table and "Script Table as"->"Select to". I thought that almost everything in SSMS was done through the SMO scripting engine, but I can't seem to find a way to do this through SMO short of looping through columns and generating the script myself. Is my Google-Fu weak, or are people just not using SMO for...
Was wondering if any one could recommend any and all books for learning more about SQL and DB concepts? I found this one while browsing SO, but was wondering if anyone had other or more up to date recommendations? ...
I have a SQL Server 2005 database with some Stored Procedures (SP) that I would like to debug...essentially I would just like to check variable values at certain points throughout the SP execution. I have SSMS 2008, but when I try to use the debugger, I get an error that it can't debug SQL Server 2005 databases. And I can't use the Vis...
I am trying to compare two tables to find rows in each table that is not in the other. Table 1 has a groupby column to create 2 sets of data within table one. groupby number ----------- ----------- 1 1 1 2 2 1 2 2 2 4 Table 2 has only one column. number ----------- 1 3 4 So Tabl...
Hi, i've a problem for a table update. follow table structure: Table1 tableid ... ... productID_1 productID_2 productID_3 Table2 productID Total I've to totalize each product in table2. For example: SELECT COUNT(*) as tot, ProductID_1 FROM Table1 GROUP Table1 then the UPDATE table2 SET total =..??? (how can...
I have the following data structure in my database: LastName FirstName CourseName John Day Pricing John Day Marketing John Day Finance Lisa Smith Marketing Lisa Smith Finance etc... The data shows employess within a business and which courses they have s...
Possible Duplicate: Hidden Features of SQL Server What are those pro/subtle techniques that SQL provides and not many know about which also cut code and improve performance? eg: I have just learned how to use CASE statements inside aggregate functions and it totally changed my approach on things. Are there others? UPDATE: ...
I have an Sqlite database in which I want to select rows of which the value in a TIMESTAMP column is before a certain date. I would think this to be simple but I can't get it done. I have tried this: SELECT * FROM logged_event WHERE logged_event.CREATED_AT < '2010-05-28 16:20:55' and various variations on it, like with the date functio...
I know the title of this question is a bit confusing, so bear with me. :) I have a (MySQL) database with a Person record. A Person also has a slug field. Unfortunately, slug fields are not unique. There are a number of duplicate records, i.e., the records have different IDs but the same first name, last name, and slug. A Person may also...