I have a table TblKit that has columns Id and Number. Id is primary key of type int and Number is varchar(50). The data in the table looks like this: I want to replace all the rows of KIT% with CH in the Number field. The desired output would look like: I have tried this update query: But it is
UPDATE rows with values from the same table
I have a table like this: I want to copy the last 3 values and at the end my table will look like this: Is it possible? Answer Use a self-join: If there are gaps in the ID space, generate gapless IDs with the window function row_number(). I do that in a CTE, because I am going to reuse the
sql select query in same table
i have a newby sql related question. let’s say i have this simple table: i’d like to query for records which have “counterparts” only, i.e. i want to get a b only if there is b a in the table but i want to skip the “back links” (which is b ahere). to sum up i’d like t…
UPDATE syntax in SQLite
I need to know if I can do this in an UPDATE statement: Or similar syntax. I’m using SQLite. Note: Nobody understands me, I just want to know if it is possible to SET separate fields to separate values. That’s all. Answer There is a (standard SQL) syntax that is similar to what you propose but as …
sql query if parameter is null select all
Can the following query be modified to return all records if the ? is null? Answer You can also use functions IFNULL,COALESCE,NVL,ISNULL to check null value. It depends on your RDBMS. MySQL: or ORACLE: SQL Server / SYBASE:
PL/SQL arabic displayed as?
When I query for data that have arabic text in PL/SQL Developer, It is showed as question marks (????). I am sure the data is correctly stored in DB because it shows on website properly, also on the …
PHP, ODBC, and SQL Injection
How does one prevent against SQL injections when using ODBC to connect to a MS SQL Server? odbc_prepare() doesn’t work (see my open question) due to bugs unixODBC, and there is no _escape or _quote …
Join a count query on generate_series() and retrieve Null values as ‘0’
I want to count ID’s per month using generate_series(). This query works in PostgreSQL 9.1: This is my output: But what I want to get is this output (‘0’ value in January): Months without id should be listed nevertheless. Any ideas how to solve this? Sample data: Answer Untangled, simplified…
SQL versus noSQL (speed)
When people are comparing SQL and noSQL, and concluding the upsides and downsides of each one, what I never hear anyone talking about is the speed. Isn’t performing SQL queries generally faster than performing noSQL queries? I mean, for me this would be a really obvious conclusion, because you should al…
Multiple conditions on the same column in the WHERE clause
I have a table something like this – How do I return the names of users where PropertyID = 13 AND PropertyVal=’Business Development Analyst’AND PropertyID = 11 AND PropertyVal = ‘Chicago’. How do I do multiple where clauses for the same column? Edit: I need the result set to look…