Increment Integer Column Value by Variable
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I'm using the following code to increment an integer column value by a variable.But the code seems not updating the value.What i'm i doing wrong?
SqlCommand command = new SqlCommand("UPDATE maintable SET counter=counter+@cvalue WHERE uname=@username", c); command.Parameters.AddWithValue("@username", "me"); command.Parameters.AddWithValue("@cvalue", value); command.ExecuteNonQuery();
UPDATE maintable SET counter=ISNULL(counter,0)+@cvalue WHERE uname=@username
[Solved] Column value increment in a single update SQL Query , Hide Copy Code. DECLARE @IncrementValue int SET @IncrementValue = 1 UPDATE Table1 SET Column1 = Column1 + @IncrementValue. Separate the variable incrementing from the field update. DECLARE @a int SET @a = 1 UPDATE tablename SET order_position = @a ,@a = @a + 1 WHERE table_id = xxx Coming from MySQL you may be overlooking a great tool for this task, ROW_NUMBER(). You can use ROW_NUMBER() to assign a number to each row in a table:
is counter and cvalue both having datatype as int or decimal ? else increment won't be done for string
SqlCommand command = new SqlCommand("UPDATE maintable SET counter=ISNULL(counter,0)+ISNULL(@cvalue,0) WHERE uname=@username", c); command.Parameters.AddWithValue("@username", "me"); command.Parameters.AddWithValue("@cvalue", value); command.ExecuteNonQuery();
SQL AUTO INCREMENT a Field, Age int, PRIMARY KEY (Personid) );. MySQL uses the AUTO_INCREMENT keyword to perform an auto-increment feature. By default, the starting value for� Incrementing and Decrementing means adding or subtracting a value (usually 1), respectively, from the value of a numeric variable. The arithmetic expansion can be performed using the double parentheses (()) and $ (()) or with the let built-in command. In Bash, there are multiple ways to increment/decrement a variable.
Why don't you directly pass the data rather then passing like parameter.
SqlCommand command = new SqlCommand("UPDATE maintable SET counter=(ISNULL(counter,0) + " + value + ") WHERE uname='me'", c); command.ExecuteNonQuery();
Please check once your value of variable "value" .
Populate a SQL Server column with a sequential number not using , Using an Identity Column to Increment the Value by 1 ALTER TABLE accounts ADD id INT IDENTITY(1,1) GO SELECT TOP 10 * FROM accounts GO we are updating the variable by 1 as well as the id column in the table. Is there a way to increment an Excel VBA integer variable like you can with C++, eg: iCol++ please - in-line? Want to avoid hard-coded numbers to increment iCol: Dim iRow As Integer, iCol As Integer iRow = 1 iCol = 1 ' HEADINGS .Cells(iRow, iCol + 1).Value = "Total"
How to add/update a column with an incremented value and reset , As you can see, I need to add the version (INT) column and insert an incremented value based on the modify_time (ascending order) which will� I'm trying to populate the Change Request number using Flow. For a new item created in the list, look up all items in the list, match on Project Number, find the last Change Request number used and then increment that number and populate the column for the current list item. I've tried a few things but I can't get it to work the way I want.
Populating a MySQL Column with Incremental Values, Simple integer incrementation. In MySQL we can create user-defined variables like @i . To set a value to a variable we use the assignment� How to increment a variable. Learn more about increment . The only more efficient you could get would be for the case where you are certain that long_variable_name does not share contents with any other variable, in which case with some work it is possible to modify the variable "in-place"
SQL TIP: Auto Increment in an UPDATE statement., table in SQL with a column that contained an incrementing integer, to update the counter column so that each row has a counter value� The MS Access uses the AUTOINCREMENT keyword to perform an auto-increment feature. By default, the starting value for AUTOINCREMENT is 1, and it will increment by 1 for each new record. Tip: To specify that the "Personid" column should start at value 10 and increment by 5, change the autoincrement to AUTOINCREMENT (10,5).
- are you getting any error?
- @PSK No exception is thrown..
- what is datatype of your variable value?
- @DarkRob Please see the update.I'm using the SQL Management studio to check the results.
- Please check the value of your variable once.
- Yeah,the datatype is int.
- to troubleshoot just try with UPDATE maintable SET counter=ISNULL(counter,0)+1 WHERE uname='staticusername' in your query and check if it works from code and in SQL server management studio
- and also try with uname='"+@username+"'
- because your uname is varchar data type