Replacing NULL value in multiple columns in a table - Microsoft SQL Server
Is there an easy way to replace all NULL values in all columns in a table? First of all, that operation would only be possible with columns that hold character data. Browse more Microsoft SQL Server Questions on Bytes Question stats viewed: 18271 replies: 2 date asked: Dec 18 '06 Follow this discussion Similar topics Allow NULL or Define DEFAULT Value Index on two columns doesn't allow NULL in both - HELP! Replacing a word in a string Indexing null dates Foreign Key with multiple columns and null value SQL0632N
NULLs and JOINs
The RIGHT OUTER JOIN includes rows from the table specified on the right side of the JOIN statement that don't match with rows from the table on the left side of the JOIN statement
Null values in WHERE clauses
However, many developer - especially those accustomed to other programming languages, such as VB - get confused on this point, and assume that the query returns the rows for which the WHERE clause returns any non-False value, and this is a major source for bugs
SQL SERVER: How To Delete a null record
http://sqlservercodebook.blogspot.com/2008/03/how-to-delete-null-record.htmlHow can I find the last day of the month How To get the comma delimited list: Returning String Instead of NULL: User Define Function For Converting Column Value i..
sql server - How to query a database for empty tables - Database Administrators Stack Exchange
For a more code-complete version, I've come up with the following, which would allow you to see the total data space used by each table in your database
I wrote down following quick script which looks into all the database on the server and provides the database name, schema name and table containing searched word in its name. Fill in your details below or click an icon to log in: Email (required) (Address never made public) Name (required) Website You are commenting using your WordPress.com account
Help! View Answers Remove duplicate values from make table query Top I have created a database and am trying to output my results, unsuccessfully at the moment. Could someone please explain to me how this is done? Thanks View Answers Dealing with Null values in math expressions Top Hi all, I am in desperate need of some advice
Microsoft Access Not-In Query SQL Tip: Finding Records in One Table but Not Another with Outer Join Queries
Finding Records in One table that Don't Exist in Another Table (the Not-In Query) Now assume that we ONLY want to find the customers who have not placed any orders. Double click on the line to open the Join properties Notice that this shows the name of the Left table and the Right table, and lets you choose your Join option
SQL: Nulls: Nothing to Worry About
We can make a reasonable argument that SUM should return zero instead of null, that the sum of no values is zero, but Oracle's implementation of the behavior we describe here is fully compliant with the SQL standard. Apparently, if you want to derive the sum of two or more columns containing numeric values, there is a difference between first adding them up horizontally and then vertically, and adding them up vertically first
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Now i want another query to be written where all column names should be checked one by one for NOT NULL Values for a prticular ID all column names should come from query which i have written i.e
If you look in the argument list of the COALESCE function, when UnitsOnOrder is null, the second argument in the list is what will be calculated, in this case a zero
http://excelkingdom.blogspot.com/2013/10/sql-server-query-to-insert-null-values_5172.htmlSUMIFS Function with Index Match Multiple Criteria to Find the Sum SUMIFS Function to Find the Sum with Index Match Multiple Criteria Suppose we have a data of different Regions with multiple Entities show... How to AUTO INCREMENT a Field in SQL SQL AUTO INCREMENT a Field we would like the value of the primary key field to be created automatically every time a new record is insert..
Replace the Null values
I have used ISNULL function and wrote a below T-SQL statement, but getting 0 in place of NULL where as I am looking for a empty spaceJust wondering whether SQL does't support empty spaceor is there any other ways to get it done.Thank you. I have used ISNULL function and wrote a below T-SQL statement, but not getting 0 in place of NULL where as I am looking for a empty spaceJust wondering whether SQL does't support empty spaceor is there any other ways to get it done.Thank you.SQL does support empty space..
SQL CREATE TABLE Statement
The LastName, FirstName, Address, and City columns are of type varchar and will hold characters, and the maximum length for these fields is 255 characters
SQL: find and replace all null or blank values with 'na' in one query
But what if you absolutely need that value in your dataset? I recently ran into this problem, and no matter what I tried, I could not get a particular field into a dataset and keep the rest of the recordset updateable, without using a DLookup(). But if you want to see what happened last month, you have to open the query and type in the range, or -- if you're using fields on a form to supply your query with criteria -- enter the dates before you run the query
I hope that you now have a better understanding of how to compare columns that contain a NULL value, plus make sure you get the correct results when using aggregate functions across columns that contain a NULL value. Why do these two different methods calculate different values? The reason for the different results is that most aggregate functions ignore columns that contain a NULL value, where as the COUNT function does not ignore columns that have a NULL value
http://javarevisited.blogspot.com/2012/12/sql-query-to-add-modify-and-drop-column-not-null-constraint-table.htmlAdd, Modify and Drop Column in MySQL table with ALTER keyword In this SQL query example we will see : 1) How to add another column in existing table with default value in MySQL database. Adding column in existing table in MySQL database is rather easy and straight forward and we will see example of SQL query for MySQL database which adds a column with default value
While they checked through their database and wrote queries for their hundreds of tables, they asked me working for another work stream to write something they can use. The simple idea is to grab a Table Name (and of course the appropriate schema) and create a Dynamic SQL statement which will calculate the percentage of NULL values in a specific table
Handling NULL values in SQL Server 2005 - TechRepublic
SELECT *, NULLIF(Product, NULL) FROM SalesHistory Operations on NULL values Since NULL values are unknown, operations on them typically require some extra processing. The COALESCE function is very useful in a join operation or in queries where you are comparing a single value from a list of possible fields to a single value
design - SQL: empty string vs NULL value - Programmers Stack Exchange
Let's assume that I'm aware of all the technical implications of choosing one solution over another and I can create correct SQL queries for either scenario. Not every one has a middle name, so you need to differentiate between "no middle name" ("" - empty string) and "I don't know if this person has a middle name or not" (NULL)
I haven't tested this on 10g or 11g yet, I might one day, but suffice to say the vendor got it sent right back at him with a request to properly test patches they were sending us! Cheers, Norm. It's like: SELECT 1 FROM dual WHERE 1 NOT IN (2, NULL); The best description for NULL is "unknown", in this select the NULL could well be a 1, we don't know
Using one Isnull() function to remove all null values from all columns a table in SQL Server - CodeProject
Write a sql query in which we use only one IsNull() function and it will remove all Null values(if any) from entire result set(from all rows) Let's consider that we have a table that has several number of columns and they might have null values
Passing NULL and table values to a parametrized SQL query - CodeProject
License This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL) Share email twitter facebook linkedin reddit google+ About the Author Darek Danielewski Architect BI Software, Inc. Introduction This tip demonstrates how to create a universal method to pass null and table values to dynamic, but parametrized SQL queries, without a need to create any special types on the server side, or relying on pattern matching for IN clauses
Handling NULL Values in MSSQL Queries : Writings of Urda
Null values can be useful in a given application, but it is important to understand how queries will behave when encountering a null value when running a query. This may or may not impact your queries against the database, so it is important to understand how the database handles these values and how your queries should be designed around this consideration
SQL NULL Values
Example: The NULL value can cause problems when selecting data, however, because when comparing an unknown value to any other value, the result is always unknown and not included in the final results
sql server - SQL: Select columns with NULL values only - Stack Overflow
What are you really trying to accomplish? If you really want to find out the column names that only contain null values, then you will have to loop through the scheama and do a dynamic query based on that. SELECT * FROM MyTable WHERE COLLATE(Col1, Col2, Col3, Col4......) IS NULL You shouldn't really have any tables with ALL the columns null, as this means you don't have a primary key (not allowed to be null)
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