To perform unit testing on a mysql database using sequelize as ORM, I need to refresh my database when each test start to run. Actually I wrote a solution like this: but every time I create tables I have to add another instruction. I would implement a single instruction to perform a complete wipe of the entire schema Something like:
Tag: mysql
How to split datetime 1 row into 2 or more rows based duration-mysql
How to split 1 row of datetime record into multiple rows by splitting duration based on datetime for every hour Input: Want to cut every hour by exact time by dividing duration Output: Answer You should try this query Here i have assumed that login and logout time have same date. it will give difference in minutes.
min of substring across many rows- exclude blank and take the least value
I have a sample data here: What I need is for each product_id, the least number is each level Expected result But as I have multiple rows for the same product id, it selects blank over 184 in level 4 Answer You can use case when you aggregate to filter out the 0 values: Note: You could also write the
Nested queries in SQL
I am trying to combine 2 queries using a nested query. The first one is this: SELECT DISTINCT( de.MCH_CODE) AS Mach, md.MAT_CODE as ShortenCode, de.TIME as start_time FROM table1 AS de JOIN …
Adventure Works 2014 SQL Queries
I am writing a SQL query using Adventure Works 2014 database. I want to show all customers and how many orders each customers have. I tried to write each select statement by itself (see below), but I’d like to be able to combine both queries into one. Answer
Foreign key relationship with composite primary keys in MySQL
Which is the best way to create a relationship between two tables when referenced table has a composite primary key? Answer One way is this As Gordon said, the best option is create an auto incremental ID and make this the primary key.
sql query : show name with all vowels
Equatorial Guinea and Dominican Republic have all of the vowels (a, e, i, o, u) in the name. They don’t count because they have more than one word in the name. You can use the phrase name NOT LIKE ‘%a%’ to exclude characters from your results. The query shown misses countries like Bahamas and Belarus because they contain at least
Making dynamic SQL queries to a MySQL DB
I’ve never used golang with mysql before, so I’m reading about these for the first time. I’d like to do something like this: This is far too much typing, especially if I have a dozen more variables I’d like to add to the WHERE condition. If this were PHP, I’d do something like this: By using a foreach loop, I
pgloader not importing data from MySQL to Postgres
I tried the following command and it returns no errors but the data is not imported in my postgres database. Database is already created in Postgres. This is the result: When I login to psql to look for the data, its not there. For example, for the table users 2 records were supposed to be imported as mentioned above by
SELECT query IF CONDITION
I have one problem with my SELECT query in my blog page. I want comment count of each blog when comment status=1. I am apply following query.. SELECT CONCAT(u.first_name,” “,u.last_name) name, r.*, …