When I select these columns, I see that the results have some NULL values. They don’t seem to be strings. However, when I try to filter the NULL values out with a where statement: I don’t see any results. What might be the possible causes? I also tried filtering with ‘NULL’ but that wo…
Tag: sqldatatypes
Data type “smallserial” in Postgres not highlighted in Visual Studio Code
I am new to postgres, and I am using Visual Studio Code IDE (version 1.62) to write my scripts. While doing so, I am observing this strange behaviour where VS Code doesn’t highlight the data type smallserial (2 bytes). Here is what I see: But I know that the script is correct because this query runs suc…
Making sense of date-time and datatypes in SQLite
I’m learning SQL and SQLite at the moment, and from what I understand, SQLite doesn’t support a datetime datatype. However, when I run the command PRAGMA table_info(Orders); it’s showing one column as being of type datetime. I’ve read that In SQLite, the datatype of a value is associat…
Arithmetic overflow error while converting varchar to decimal datatype
I am trying to convert varchar(14) to Decimal(14,2). My code is something like I am only getting Arithmetic overflow error message when the value of @varchar_variable is large (like ‘10000000000189’) Why am I getting this error message for larger values ? Are values like 10000000000189 out of rang…
What is a type of my value 675763582022462206:57 in sql creating data table query?
I am creating a table with several columns in sql: and one of them is going to have values like this: 675763582022462206:57. As you see it has : in it. So what is a type of it? Is it UInt16 or String? Answer It must be varchar or nvarchar in this case. The database doesn’t recognize “:” as a…
Oracle SQL Developer limit number of character of datatype char(5)
I was tasked to implement a table with a variable groupcode. There are several requirements. char(5) 2 or 4 uppercase letters plus 1 digit whose value is between 1 and 4 (e.g., AA1, AABB1) Any input other violating point 1 and 2 should be banned The only thing I can come up with is regexp_like but my efforts …
How do I utilize a WHERE clause with a MONEY data type?
So to keep it simple, I’m working on a problem that requires a simple case of utilizing the WHERE clause to bring back records that have the field (we’ll call it ‘tax’) equal to $0.00 So as per usual, I thought I could do: WHERE tax = 0; But I keep getting an error. And I’m prett…
How to convert varchar column values into int?
I have a column toysid which is of varchar datatype in one table. Also another table having same the column toysid with int datatype (I know I can modify column for first table but I have to follow some procedure to keep it as varchar). I have written following query to join the table: The query returns error…
Why doesn’t SQL Server support unsigned datatype?
I am specifically thinking about unsigned int. Here is a practical example: what do you do when your identity column maxes out? It’s possible to either go BigInt (8 bytes storage instead of 4) or to refactor the application to support negative integers, and even to create your own rules as indicated in …