I have following data in SQL Need sql queue: I have 10 tags, it is continuously logging to SQl at every 10 Seconds of intervals. Now i want create report like…..User will provide time interval …
Tag: sql
How to perform a left join in SQLALchemy?
I have a SQL query which perfroms a series of left joins on a few tables: So far, I have: but I can’t figure out how to make the join a LEFT JOIN. Answer The isouter=True flag will produce a LEFT OUTER JOIN which is the same as a LEFT JOIN. With your code: Declarative example:
Postgres Function to insert multiple records in two tables
create table public.orders ( orderID serial PRIMARY KEY, orderdate timestamp NOT NULL ); create table public.orderdetails ( orderdetailID serial PRIMARY KEY, orderID integer …
How do I query time data type with between 2 times varying over midnight
How do I query time data type with between 2 times varying over midnight. Here is what I have tried. declare @timeValue time SET @timeValue = ’23:30:00′ SELECT @timeValue,DATEADD(minute, -30, @timeValue),DATEADD(minute, +30, @timeValue) WHERE @timeValue BETWEEN DATEADD(minute, -30, @timeValue) AND…
Comma-delimit multiple columns when some values may be null
I need to comma-delimit the values contained in multiple columns, when each of the columns could contain a NULL value: Results: Is there an approach that is less cumbersome than what I’ve done for abc, preferably without having to use PL/SQL? Answer The function that you really want is concat_ws(), but …
Can I store a Word document in a PostgreSQL database? [closed]
We maintain our data in a PostgreSQL database, and keep the relevant documentation in the form of Word (TM) files. Now a peculiar sentence in the description of the project states that the …
group some row in resilt table
I need get a group some row select from result table. I’ve written select but have error message ORA-00913. How to write a correct select ?I have a result table: and insert: and I need to get result table: I’m trying: but ora-00913 too many values How to write correct “select” ? Sorry,…
How to retrieve multiple column from SQL database?
I’m trying to get two column details like this way: public string GetData() { using (SqlConnection con = new SqlConnection(this.Connection)) { con.Open(); …
postgres column “X” does not exist
I have this postgrse code: and I get this error: how can it be? it’s a value not a column.postgr Answer Use single quotes for string constants Also you can escape single quotes in data by doubling them SQL FIDDLE DEMO
Find closest or higher values in SQL
I have a table: table1 I have to generate the following table: table2 So, table2 should have all values from 1 to 100. There are 3 cases: If it’s an exact match, for ex. rank 25, value would be 120 Find closest, for ex. for rank 9 in table2, we do NOT have exact match, but 1 is closest to