Database query results: 11 code ID 1 purchased 3 times 11 Legacy ID 2 purchased 10 times on November 12th, ID 36 purchased once on November 12th, ID 37 purchased once SQL statement "$chartData " countid ID FROM_UNIXTIMEadd_time m...
problem description other official database query methods are Query::table (User::class)-> selectInstance ( other )-> where ( id , $userid)-> limit (1)-> get ()-> getResult (); but I find it troublesome. I want to operate other databases in the...
question: select * from table where created_at > where is the problem? How to solve? answer: time writes dead, closes, time opens, there must be closing time. The question is, why should it be a closed interval when querying this time field? It ...
The database has such a table User and a user s log table User_log want to query the user according to the log, so the user has such a sql SELECT * FROM (SELECT * FROM User_log Order By create_time LIMIT 0, 50) JOIN User ON User.user_id=User_log.user...
problem description there is a fixed number of incoming and outgoing orders when leaving the warehouse, and you need to subtract the remaining quantity of the entry orders when you complete them. Because the quantity is uncertain, the earliest complet...
use directly alter table order_log add outdated int default 0 null; it hasn t been over for a long time is there any way to speed it up? ...
multiple different spider crawled data to the same database table using one pipeline, and found that the data was overwritten ....
the model, created by sequelize-cli modifies the foreign key associate hasMany and other relationships, how to Synchronize this foreign key relationship to the database? ...
as shown in figure this kind of tag filtering can be done directly by sql if it is taken directly from the database, but it is not ideal. If the listing of each tag has a list of Redis, for example: the list of area (Chaoyang District)-1 235,456, ...
The sql statement of mysql can be operated successfully in the database, but execute is not successful in the code. String comput_rsi= "update price set rsi6= (100*aver_up_6) (aver_up_6-aver_down_6) "; "update price set rsi6=123 "; A fixed va...
what storage do Weibo fans use? Use mysql? How many watches will it take? ...
There are 1000 pieces of data in the user_default_avatar table, but the result of the query is always greater than 500 instead of floating around 500? select * from user_default_avatar order by rand() limit 100; ...
how the mysql database sets user permissions, such as 100 tables. I want to set the user to read only 99 of these tables. There is also a table that does not have access. -sharp-sharp-sharp problem description the environmental background of the probl...
what do parseTime and loc mean when golang connects to mysql? import ( "github.com jinzhu gorm" _ "github.com jinzhu gorm dialects mysql" ) func main() { db, err := gorm.Open("mysql", "user:password@ dbname?cha...
if you open the image of Tsinghua see the following MySQL-5.0.95-1.glibc23.rpm MySQL-bench MySQL-client MySQL-client-community MySQL-community MySQL-community-debuginfo MySQL-debuginfo MySQL-devel which one should I choose for so many pack...
1. I happened to see that when someone posted a post to initialize the mysql_install_db data directory, he saw that someone specified the location of the configuration file directory, but the command was forgotten. Can you specify it in the initializati...
and how to get the original sql it executes < hr > show binlog events I used this statement. It turns out that this defaults to the first file . ...
use mysqldump to back up data from the MySQL server on the web server if so: mysqldump -hxxx.xxx.xx.xx -uusername -ppwd db table --where="order_id > 4300284 and order_id < 4300293" > xxxx file.sql enter the password in clear text...
it is OK to import the first N records of a single table, but now there are almost 40 or 50 tables in the whole library, which is too time-consuming and stupid. Want to export the first 1000 records of each table in a database at once. Many online search...
sql executes sequential from,on,join. reference article there are two tables, posts 10000 data, post_slugs 14 records, and posts, two tables are associated by post_id. Use mysql SELECT * from posts,post_slugs where post_slugs.post_id=posts.post_i...