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18 gru 2013 · => select date_field from table_name where date_field is not null If you want the default value to be null => SELECT NVL(DATE_FIELD, '1900-01-01') FROM TABLE_NAME
12 sty 2020 · It appears that for a DATE or DATETIME field, an empty value cannot be inserted. I got around this by first checking for an empty value (mydate = "") and if it was empty setting mydate = "NULL" before insert. The DATE and DATETIME fields don't behave in the same way as VARCHAR fields. answered Aug 28, 2016 at 13:30.
19 sty 2001 · But sometimes we try to push a blank value in the date column, which results in translating and inserting a 1900-01-01 00:00:00. The value 'Blank' (Single Quote with no value) is meant for data types which accept character data, but it is not recognized by the date or datetime data types.
17 lis 2015 · If you're checking whether or not the value is NULL, there is no need to convert it to a date, unless you wanted to return a date value (which you don't seem to). Instead, use: SELECT ISNULL( DOB , '') Which will return '' if the value is NULL. A NULL date is NULL (no value).
Consider the following code in Microsoft SQL Server 2012: INSERT INTO [dbo].ProductionSELECT [field1] ,[field2] ,cast([datefield] as datetime)FROM [RAW].Staging. The staging table is loaded with data from a CSV file.
You want to select rows with the NULL value in a given column. Example: Let's see a table named Employees with the following columns: EmployeeID, EmployeeName, Dept, and Salary. Assume the Salary column allows NULL values.
19 maj 2021 · Handling SQL NULL values with Functions. As we stated earlier, SQL Server offers some functions that help to handle NULL values. ISNULL (): The ISNULL () function takes two parameters and it enables us to replace NULL values with a specified value. 1. ISNULL (expression,replacement)
