Questions tagged [type-conversion]
For questions about converting one data type into another, or issues arising from that process.
181
questions
0
votes
1
answer
421
views
Why SQL Server returns conversion error when mixing different data types in bulk INSERT statement?
I'm using Microsoft SQL Server, the version doesn't really matter, because it seems to work the same on most of the versions.
It's easier to show an example than explain:
CREATE TABLE form (
id ...
- 181
0
votes
0
answers
18
views
Combine INT, TIME fields and compute Elapsed Percentage
Need calculation and conversion help...
Columns:
[Days] INT
[hh:mm:ss] Time
[AllowedRuntimeMinutes] INT
Need to combine [Days]+[hh:mm:ss] as the duration the query has been running, and then calculate ...
- 33
0
votes
0
answers
119
views
Using CONVERT for datetime 24 hours with style codes undocumented for?
Using CONVERT for datetime whose time part is 24 hours - works. Examples with style codes 101-105:
SELECT CONVERT(datetime, '05/24/2023 23:30', 101)
SELECT CONVERT(datetime, '2023.05.24 23:30', 102)
...
- 437
2
votes
1
answer
835
views
Converting varchar to decimal with truncate
I have a column called latitude which is currently varchar(20)
I want to convert it to DECIMAL(9,6)
However the data stored inside the column is greater than 6 decimal points
i.e.
48.123456891123456
...
- 181
1
vote
1
answer
229
views
TRY_CAST fails when fed very long string... but only from column or variable
I've recently encountered this weird behavior of TRY_CAST function, and I wonder what's going on here. (It feels like bug, but most of such bugs I have encountered in past were actually intentional.)
...
- 130
2
votes
2
answers
183
views
Using TRY_PARSE in SQL Server 2008
I have a script in SQL Server 2012 like this:
Declare @ParamSPKDateFrom varchar(50), @SPKDateFrom date,
Select @SPKDateFrom = TRY_PARSE(@ParamSPKDateFrom AS date USING 'id-ID')
Can I convert this ...
0
votes
1
answer
920
views
Convert an Int column to BigInt in a stored procedure in SQL Server 2012
We have a stored procedure that uses SUM on an Int column in the SELECT statement. We have a few cases where for one of the parameter values, the SUM(integer column) exceeds the Int range and ...
- 437
7
votes
1
answer
1k
views
Why does TRY_CAST throw an error when attempting to convert VARCHAR to UNIQUEIDENTIFIER?
I have a VARCHAR(MAX) column in a table that can store data in many different formats, including the GUID format. I tried the following code when joining a UNIQUEIDENTIFIER column in another table:
...
- 32k
0
votes
1
answer
396
views
MySQL incorrect equality casting bigint to char
Why is the following statement true in MySQL?
CAST(544553000004545482 AS CHAR) = 544553000004545446
--Background--
I am querying a database with user IDs stored as VARCHAR(255), but my program ...
- 3
-1
votes
3
answers
5k
views
How to select Max date that is valid?
I have a date as varchar (dont ask why). I need to select Max(date). However, date can be faulty, like 2034-34-34. I would like to select max date that is valid and not greater than today. It's t-sql.
...
- 133
1
vote
1
answer
229
views
How to retain same FLOAT value after converting it to a VARCHAR in Azure Synapse
Consider the following example:
DROP TABLE dbo.TEST_FLOAT;
CREATE TABLE dbo.TEST_FLOAT (
AMOUNT FLOAT
);
INSERT INTO dbo.TEST_FLOAT (AMOUNT) VALUES (11546.25);
SELECT AMOUNT, CAST(AMOUNT AS ...
- 69
0
votes
1
answer
4k
views
Strange Error ... Conversion failed when converting the varchar value 'www.com' to data type int
The issue that I am running into is happening on Microsoft SQL Server.
I have a view that is unioning together 2 tables. It is returning a little over 7 million records.
When I attempt to JOIN ...
- 33
3
votes
1
answer
98
views
How to find type mismatches (implicit conversion) between sprocs and tables?
I have a sproc that has these lines
DECLARE @newTimestamp datetime = CURRENT_TIMESTAMP
UPDATE dbo.Accounts
SET Modified = @newTimestamp
However, in the Accounts DB, we have this
[Modified] ...
- 145
7
votes
3
answers
1k
views
Alternate Solution For REPLACE() In ntext Column
Overview
I have a picture database that catalogue information of pictures taken with cameras. The database contains a table pictures which has 256 columns which contain information about the picture ...
- 17.4k
5
votes
1
answer
655
views
Standard Deviation for Times
Is there a T-SQL coding best practice to get an accurate standard deviation value for a group of times? STDEV doesn't like the time data type. I'm thinking that maybe a conversion to minutes as an ...
- 147
1
vote
1
answer
38
views
Convert specific time format to common one
Environment:
I have 'duration' datas stored as varchar(4) in a table.
2 first characters are hours, 2 last characters are minutes. E.g.:
0100 means 01:00
0456 means 04:56
and so on...
What I need:
...
- 113
3
votes
3
answers
1k
views
Implicit conversion: when does it hurt performance a lot?
I know that when data types are the same it is good and it hurts performance when they are not.
But sometimes it seems to have very little impact and basically a waste of time to fix it. Other times ...
- 795
0
votes
1
answer
228
views
Need help identifying how to make a function selectable using table() clause and a custom data type
I would like to be able to run the following code to select records:
Desired Syntax
select * from table(my_new_package.get_data(123))
I have been successful in creating code that compiles, but I am ...
- 23
6
votes
2
answers
4k
views
PostgreSQL - CAST vs :: operator on LATERAL table function
While I can
SELECT
elem[1], elem[2]
FROM
(
VALUES ('1,2'::TEXT)
) AS q(arr),
LATERAL CAST(String_To_Array(q.arr, ',') AS INT[]) AS elem
;
using an explicit call to CAST, I can't
SELECT
...
- 183
-2
votes
1
answer
358
views
Convert Varchar to Datetime
I have a database field Column_A which is in Varchar(16) not null and the values are for example 20191210215033CS but I want to break it like 2019-12-10 21:50:33
Since it is a production database ...
- 1,039
4
votes
1
answer
2k
views
SQL Server with French_CI_AS Collation date conversion
I have a French installation of SQL Server using French_CI_AS Collation. For legacy reasons, a table column stores data as VARCHAR which is later converted to the right type, akin to variant in C++.
...
0
votes
2
answers
123
views
Do user defined data types always cause implicit conversion to occur when fields of those UDDTs are used as predicates?
I have a database (from a vendor application) that for some unknown reason has a UDDT on almost every column, even when the UDDT is logically the same as the underlying type it implements. E.g. a ...
- 35.2k
0
votes
1
answer
699
views
PostgreSQL 9.6.17 COALESCE function error
I'm trying a SQL query with the function COALESCE in PostgreSQL 9.6.17, but it produces an error:
invalid syntax for type double precision: ""
Example query:
SELECT COALESCE(date_part('...
-2
votes
1
answer
267
views
ALTER DATABASE MODIFY FILE fails - I want to alter data file sizes using size = @variable - not working
Example:
DECLARE @sql NVARCHAR(255)
DECLARE @DBname NVARCHAR(128), @FileName NVARCHAR(128), @NewSizeMB INT
SET @DBname = 'AGTestDB'
SET @FileName = 'AGTestDB'
SET @NewSizeMB = 1024
SET @sql = N'...
- 47
0
votes
4
answers
5k
views
Why does SQL Server say it can't convert varchar to numeric?
I have the following schema/data in MSSQL Server 2019 (SQLFiddle):
CREATE TABLE products(
idn NUMERIC(9) PRIMARY KEY
);
CREATE TABLE sales(
idn NUMERIC(9) PRIMARY KEY,
pid VARCHAR(50) ...
- 849
5
votes
3
answers
741
views
how to solve this warning in select
I have a problem with this query:
SELECT *
FROM Sales.SalesOrderDetail sod
JOIN Sales.SalesOrderHeader soh
ON sod.SalesOrderID = soh.SalesOrderID--- adventureworks db
Warnings
Type conversion ...
3
votes
1
answer
772
views
Get date from SQL Server audit filename
SQL Server audit filenames use the following pattern:
Name_GUID_PartitionNumber_Timestamp.sqlaudit
An example filename below:
Audit-ObjectChanges_2D94C1E8-CCAD-405F-A9F2-...
- 133
1
vote
1
answer
3k
views
Mongo: how to covert a string to decimal?
I have written millions of documents with $CURRENT_CASH_BALANCE as strings instead of decimals. How can I convert them all to decimals?
- 11
0
votes
3
answers
539
views
Convert two integers into timestamp
How do I convert two integers, one for date and one for time, into a timestamp?
Given 20200304 and 1046, return a timestamp for April 3, 2020, 10:46 AM.
Given 20200304 and 946, return a timestamp for ...
- 279
1
vote
1
answer
83
views
out of all columns in a table, how can I find the one datatype that is cheapest and I could convert all other columns datatypes into?
I sometimes have to unpivot tables, that means, converting all columns into rows.
Generally that becomes a table with 2 columns (just to simplify things) - the first is the column name and the second ...
- 15.8k
0
votes
1
answer
111
views
How can I output a legible timestamp from "1583981745.335346" (stored in a 'double' field type) via a select statement?
I have a table within a WordPress installation that stores timestamps in a format that I do not recognize, nor can I figure out how to translate it. In the MySQL database, it appears as "1583981745....
- 23
0
votes
1
answer
181
views
MySQL: Use index in background query
I'm using MySQL 5.7.10
I'm checking a new query for an audit report.
I'll execute it in a simple background Unix process, whick invoke mysql from the console.
To check the query, I use a worksheet in ...
- 141
0
votes
1
answer
713
views
converting latin to utf8mb4 causes questionmarks
The original format of the data is unknown
The new table is in utf8mb4_general_ci
If I do CONVERT(BINARY CONVERT(column USING latin1) USING UTF8) as mentioned here - it fixes all text, but converts ...
- 1
1
vote
1
answer
3k
views
Casting int YYYYMMDD to date produces incorrect value in Squirrel-SQL
I have extracted some data from a legacy database where dates are stored as Numeric(8) values, in YYYYMMDD format. I've stored them in a staging table in that same format, and now I would like to ...
- 356
0
votes
1
answer
36
views
Why when I JOIN to a casted field in an index view, the execution plan warns about "type conversion in expression"?
I thought an indexed view was materialized and therefor stored on disk. If that's the case, I would've thought that any type conversions I'm doing in the view would materialize as that datatype on ...
- 35.2k
2
votes
0
answers
272
views
Postgres 11: fastest way to convert a small list of numbers to text (to be used as NOTIFY payload)
I am on Postgres 11.5 and in a trigger function I issue one or more pg_notify calls for each row modified in the transaction. The most common payload is a list of 12 float numbers, representing two ...
- 927
1
vote
0
answers
31
views
Slight change of query causes CONVERT of illegal values to be done first, causing a conversion error [duplicate]
I have a table MyTable which has columns OldVal, NewVal, Nme which are all VARCHAR(MAX)
Wherever Nme = MyValue, the OldVal and NewVal values will be "integers" IE a numeric value value stored as a ...
- 1,928
6
votes
2
answers
654
views
default permissible datatype conversion matrix
Today I wanted to define a uuid of value 00000000-0000-0000-0000-000000000000. Being a SQL Server man, I'd usually...
select cast(0x0 as uniqueidentifier);
...but I'm in postgres world now so I ...
- 4,586
1
vote
1
answer
967
views
Different Date format in predicate when comparing against a date or datetime
I have the following query:
SELECT CAST(MyDateTimeCol AS DATE) AS MyDate,
Col1,
Col2
FROM MyTable
WHERE MyDateTimeCol >= '2019-11-25' AND MyDateTimeCol < '2019-11-26'
...
- 1,928
0
votes
0
answers
69
views
Explicit conversion to avoid the implicit conversion warning [duplicate]
I have a TVF function which has the below code in it.I stripped down the function and has the logic as shown below.
WITH X
AS (SELECT cis.ProductionStatus AS CurrentDiaryStatus,
...
- 1,305
2
votes
2
answers
4k
views
How to bulk convert ISO8859 text in Text columns to UTF8 in nvarchar(max) columns?
I've been struggling for days with a problem on a MS SQL database. Here is the situation: I have an old Open Source PHP application (Limesurvey version 1.92) running on a Windows 2008R2 server, with ...
- 21
0
votes
1
answer
1k
views
Cast string to decimal without rounding the decimal part
I'm having this problem when casting a column from string to decimal. The problem is that after I do the cast on the column, it writes it in the new table as decimal, but rounding the decimals. I don'...
2
votes
1
answer
774
views
How to combine date and time with a string value in column created by Case in SQL Query
I am in the process of creating a query for an SSRS report that will show a column that has DATETIME values. The column can have NULL values. In my query I would like to use a CASE expression.
I ...
2
votes
1
answer
9k
views
Convert sql_variant to varchar to select left 2
I am trying to populate a column (versionstatus) with if the service pack needs updating. I have created a lookup table which lists the SQL Version, and the latest product version, e.g.
SQLVersion ...
- 369
2
votes
2
answers
446
views
Implicit conversion between decimals with different precisions
I know that when SQL Server handles an implicit conversion between types it converts the lowest priority one to the highest one.
But what is the result datatype when I perform an operation between ...
- 303
2
votes
1
answer
436
views
How can I make this execution plan more efficient?
I have worked out all the implicit conversions, but I still see mentions of it in the plan. I have attached the plan, and any recommendation will help.
select cardholder_index, sum(value) as [RxCost] ...
6
votes
1
answer
2k
views
SQL Server error 242 with ANSI datetime
I'm trying to debug a MS SQL Server error 242:
The conversion of a char data type to a datetime data type resulted in an out-of-range datetime value.
The error is originated by this statement:
...
- 337
4
votes
1
answer
146
views
No IMPLICIT_CONVERSION warning in this query plan
Take the following minimally complete and verifiable example1 code:
USE tempdb;
DROP TABLE IF EXISTS dbo.t;
GO
CREATE TABLE dbo.t
(
t_id int NOT NULL
CONSTRAINT t_pk
PRIMARY KEY
...
- 69.7k
3
votes
2
answers
827
views
Index Seek scanning whole table dependent on parameter value
I have a query:
SELECT Id,
ColumnA,
ColumnB
FROM MyTable
WHERE ColumnA = @varA OR
ColumnB = @varB
The table is defined as
CREATE TABLE MyTable
(
Id INT IDENTITY(...
- 1,928
0
votes
1
answer
5k
views
How to convert date and/or time from character string as variable field
I have a backup report which looks to see if all databases have been backed up within the last 30 days, and want to insert 'Not all databases backed up in last 30 days' into that field (datetime type) ...
- 369