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Tag: sql

Getting row samples from PostgreSQL

I have a data table with timestamp and some data columns. The rows are inserted in arbitrary time intervals, i.e. the timestamp difference of consecutive rows is not stable but ranges from several seconds to several hours. I need to select one row per time interval of constant length, if there is any. Example…

Display all data which are between these dates

So currently, I am trying to display a list of items which are not between date X and date Y. Let us assume that book_date_start = 2021-06-15, and bookdate_end = 2021-06-20 This is my current query: So based on this So basically as I was writing the above out, I realized that my query is WRONG, and since 2021…

SQLite Insert Distinct from 2 variables

I have a SQLite DB with a table with the following kind of data: What I need to do is take columns B and C, create a single unduplicated list and autoincrement the primary key for the unique values. It needs to check to make sure an entry is not already existing – so the second table would be: I

How can I show values with zero in a Group By query

I am trying to get the zero values from my status table associated with the case of one user. So, I have this query that returns me only one value because, I have only one case associated with one status but I want to receive also the another status with value 0. So I have the status ‘Open’ and &#…

SQL Query creation with multiple joins

I am working with MYSQL, and want to create a query. I have 3 tables. QUESTION QUESTION_NUMBER QUESTION_DESCRIPTION 1 anydesc 2 anydesc2 ANSWER ANSWER_NUMBER ANSWER_DESCRIPTION 1 anydescANS 2 anydesc2ANS 3 anydesc3ANS And a bridge TABLE QUESTION_ANSWER Q_NUM A_NUM 1 1 2 2 2 3 Now I want to retrieve all the An…

SQL replace and insert Into

I have this table “NamesTable” in SQL Server. I want to insert and replace in a second column the corresponding name like this This is my query: The query runs and replace the selected words, but do not insert into my existing table. What I am doing wrong? Answer No idea what is the objective of y…