I’m not sure if I will explain this correctly so apologies in advance. I’m looking to put together a report that shows the number of times a site (central_site.site_code & central_site.site_name) …
Tag: count
What is the difference between count (*) and count(attribute_name)?
Is there any difference between COUNT(*) and COUNT(attribute_name)? I used count(attribute_name) as I thought that it would be specific hence the searching process would be easier. Is that true? It would be great to see any example with sql code with my issue to help me understand better Answer Imagine this table: count(column_name) also counts duplicate values. Consider:
Join three count queries and get results in to three columns
I want to combine three count queries and get results in to separate columns. This is how my data set looks like. I have tried this select id, sum(val = 3) as valcount3 from (select id, s1 as val …
How to increase performance of COUNT SQL query in PostgreSQL?
I have a table with multiply columns. But for simplicity purpose, we can consider the following table: create table tmp_table ( entity_1_id varchar(255) not null, status integer default 1 not …
mysql error “ Operand should contain 1 column(s)” when count occurrences in multiple columns
I want to get occurrences in multiple columns and count null values as zeros. I have tried this. select IFNULL((select id, count(*) as v from ( select id, s1 as val from t1 …
MySQL count values and put custom columns
I have this query: SELECT count(password) as normal, count(fb_id) as fb, count(google_id) as google, count(linkedin_id) as linkedin FROM `users` which returns (correctly) : normal | fb | google | …
Find the count of words in string
SQL: How to find the count of words in following example? Subquestions: How to count spaces? How to count double/triple/… spaces as one? answer by Gordon Linoff here How to avoid counting of special characters? Example: ‘Please , don’t count this comma’ Is it possible without string_split function (because it’s available only since SQL SERVER 2016)? Summary with the best
MySQL Grouping using group_concat and then Group BY
I have a table like this: Basically, I want to group all names and give the count of such groupings like: Since there are 2 users with cooking and cleaning, 1 for washing and 4 for cooking. I am …
How to select only rows from a table one clumns value is more than b table count value in MySQL
Table A: id, name, school_code ——————- 1,David,10601 2,Jack,10602 3,John,10603 4,Hank,10602 5,Daisy,10601 6,Kelly,10602 7,May,10602 8,Mayme,10602 Table B: id, school_code,max_stu ——-…
Group By and Count the total number of same status value
I have 2 tables, Order and Store. And here are some of the fields from the table I need. Order table OrderId StoreId SystemOrderStatus 1 1 Received 2 1 Sent …