I have a query that I run to fill the CFChart that I am trying to parameterize:
SELECT *
FROM closed_tickets
WHERE MONTH(closed_date) = #month#
AND YEAR(closed_date) = #dateFormat(theMont
Month: October 2021
Mysql thousands of large data query optimization
1. Optimize queries and avoid them as much as possible For a full table scan, you should first consider establishing an index on the columns involved in where and order by. 2. Try to avoid the wh
Can the alliance initialize in the statement?
For example, suppose we have a union
typedef union {
unsigned long U32;
float f;
}U_U32_F; Is there any way to set the initial value when declaring this union type variable?
U_U32_F u
C # regex class
Remembering the development environment caused by Chocolatey
Remember a development environment error caused by Chocolatey 前情 This morning When I went to work, I finished writing the code and started running the code as usual, but I kept reporting errors. Be
Mysql common operation
mysql backup:
docker exec container ID mysqldump -uroot -p password–databases library name> library name.sql –Create user:
create user ‘username’@’%’ IDENTIFIED BY ‘password’;
–Create
If there is a column in MySQL, use the alter to delete columns
If the column exists, how to use ALTER to delete a column in the MySQL table?
I know that I can use ALTER TABLE my_table DROP COLUMN my_column, but if my_column does not exist, an error will
[11] mysql: optimization
The words written in the front
Whether as an operation and maintenance or as a DBA, our job is not to write SQL and engage in business . More is how to achieve a good and fast way to provide
C # function returns a method of multiple values
Sometimes we need a function to return multiple values. On the Internet, it is mostly implemented with out. I personally like to use the tuple method.
Tuple is a tuple, which supports up to 7
C # special symbol
Special symbols As mentioned earlier at the beginning of @, the character The string is free of escaping. Whatever is written in the string is what is written in the string. \ not escaped ?? Dete