I have two tables DOCUMENT and SIGNATURES, like below And I’m try to get last signature name. I have a SQL FIDDLE with database and query, but when run search no record has found. http://sqlfiddle.com/#!9/b98474/3 Here my query Answer A simple method is a correlated subquery: With an index on signatures…
Substring to Get value only after first occurrence of : in Oracle SQL
I have data in below format in an Oracle table column: I want to have data in below format i.e to have distinct first string after first occurrence of :: I can get the value for first record using below query But I am unable to get it for others if there are more than one : in a column
How to convert a timestamp field to int8? Or just drop the column and make a new one?
I have a PostgreSQL table with a column of type timestamp. I had included this column a while ago just in case I wanted to use it for something in the future. I am now looking to convert it into an int8 and use it as an epoch time column. All rows of the table have this column set to
SQL Check if the User has IN and Out
I need help getting the User which has an ‘IN’ and ‘Out’ in Column isIN. If the user has an IN and OUT do not select them in the list. I need to select the user who has only had an IN. Please I need help. Thanks in advance. This is the table: Need to get the result like I
SQL total for each row combination
Are there any types of aggregate functions that could help calculate the following? If I have the following data, I want the sum total for each duplicated row. The output would provide total number each row occurs: Answer Why not good old group by and count?
Can I query a aggregated query and a specific row’s query when using subqueries?
I am new to SQL and I wanted to return the results of a specific value and the average of similar values. I have gotten the average part working but I’m not sure how to do the specific value part. For more context, I have a list of carbon emissions by companies. I wanted the average of a industry based
Include Column name in SQL Unpivot
I have an unnormalized data set I need to normalize for reporting purposes. I successfully unpivoted the data using this: How can unpivot column headers Question1, Question2, Question3, Question4 as a third column in my unpivot query, like this? Answer Your syntax looks like SQL Server. If so, just use a APPL…
How to create a sequence in a specific format in postgresql?
I want to automatically generate an unique entity field in Postgresql in following format: “ССDDD” where “C” is a character and “D” is a digit. For example “FG1752” or “HK9273”. How can this be implemented? Answer here is one way in mysql : in postgr…
PostgreSQL simply transpose/convert rows to columns
I read some SO posts like sql server 2008 r2 – Transpose rows to columns – Stack Overflow or sql – Postgres – Transpose Rows to Columns – Stack Overflow, but they are too complicated task to what I want to implement, and what I want to is pretty simple task. For example, assume I…
Is this possible to calculate this?
Is this possible to store the decimal type value in number column. 1/12 will be 0.083 and wants to store that in that column. create table test(number1 int,number2 int,number float) insert into test …