I have a SELECT query as below: This query gives me an output like this: My question is, how to filter the 0 due records from due_balance and modify the query to get the rest? Expecting result should be: I tried it in this way, but it doesn’t work for me. Answer Use HAVING Clause or use subquery then ad…
Tag: mysql
MySQL PHP insert new row where rowNum column values always remain chronological by date and time
I am trying to create a SQL query (or multiple queries and logic in PHP) to insert new rows into MySQL db table (say table name is student) where the rowNum column values always remain chronological dependent on a separate date/time column. This means that if the row I’m inserting has the greatest/max/l…
Join Only Unique Values From 2 Tables
I’m trying to join two MySQL tables, and return only the unique values between them. eg. I want to get as my result a table that only shows the intersections of rows without any duplicates where I’m joining on table1.column1 = table2.column1: Simple joins and unions and I’m ok, but this one …
SQL Query to check not repeated values
I’m new to SQL. I wanted to know, How to check the entries which are not repeated for the other entries. Better I give one example. column1 column2 a 1 a 2 a 3 a 4 b 1 b 2 b 3 b 4 c 1 c 2 c 3 I want output as column1 column2 c 4 because c
Get movies that have categories
I have associative table movies and their categories. How can i get movies that have category 1 and 2? Result: Answer Do GROUP BY. Use HAVING with COUNT DISTINCT to make sure both 1 and 2 are there. Just for fun, you can also do a self join: Or, use INTERSECT:
Laravel – Get sum of a column without querying to database more than once
My table structure is like this: but now I want to move the gift to another table since the gift can be given to the users more than once in different dates. I have used $user->gift in many places in my project and I don’t want to change the code. So I want to create a method in User model
SQL to append records
I have two tables tbl1 and tbl2. Consider tbl2 as the main set and tbl1 has been derived from other sources but will essentially now be a subset of tbl2. tbl1 cd productcd type 1 1 A 1 2 AB 1 3 A 2 3 AB 2 4 AC 3 1 A tbl2 cd productcd type priority 1 1 A
How to insert to a table if there exist a value in another table
i have tried this I want to insert to examqst only if there is a row examid in examname table and s_id in examname have a perticilar value Answer You could an INSERT INTO…SELECT:
casting date within a to_char function?
How can I cast a date or timestamp column to date within a to_char function? But I need to cast the date_column to date first but am unsure Thanks Answer TO_CHAR, as you are using it above, appears to be Oracle code. MySQL uses the DATE_FORMAT function:
How to improve a mysql COUNT query for speed?
How can I improve this query for speed? at the moment it’s taking a couple of seconds only to load the php file where the query is without even querying anything. I’ve an index on skillsTrends, jobtitle and industry. Collation: utf8mb4_unicode_ci Number of records < 1,000,000. Answer Try this c…