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mysql - Use PHPEXCEL to import 5000+ items of data from an excel file into the database. The local database is normal, but only 15 items are imported online. No errors are reported. What is the problem?

Use PHPEXCEL to import 5000+ items of data from the excel file into the database. The local database is normal...

From [MySQLdiscussion group] 2017-05-27 17:38:55 0  2  1113

mysql安裝 - Mac 上安裝mysql出現(xiàn)的問題.ERROR 1045 (28000):...

描述你的問題這個問題從昨天安裝開始,百度.Google都找遍了.問題如下: 錯誤信息: {代碼...} 安裝的mysql版本是mysql-5.7.10-osx10.10-x86_64在控制臺直接 輸入mysql 我記得以...

From [MySQLdiscussion group] 2017-04-17 13:46:44 0  3  1112

Question about not being able to modify field names in MySQL

(www.sf.gg) is China's leading developer technology community. We hope to provide a pure, high-quality technic...

From [MySQLdiscussion group] 2017-06-26 10:49:27 0  1  1111

php - How to split large batches of data?

Hello everyone, there are 10,000 orders in the database, and various calculations need to be performed on the ...

From [MySQLdiscussion group] 2017-06-24 09:41:39 0  2  1111

mysql - How to make the sql of the java project compatible with the sql syntax of multiple databases?

How can SQL statements in Java projects be compatible with multiple databases? The project belongs to the prod...

From [MySQLdiscussion group] 2017-05-18 10:45:51 0  2  1111

關(guān)于mysql primary key的解釋

我看網(wǎng)上說primary key 就等于唯一＋不為空，而且一個表里只能有一個primary key，但是我在數(shù)據(jù)庫創(chuàng)建表的時候PRIMARY KEY (username,bm_URL)，這樣不就2個主鍵了？而且我inse...

From [MySQLdiscussion group] 2017-04-17 13:35:33 0  5  1109

SQL Count() also requires 0

I have only one table and I want to count each entry of a tag that starts with 0. Now I try this: SELECT tag,C...

From [MySQLdiscussion group] 2024-04-06 19:48:53 0  1  1108

mysql - schema database design for Q&A website?

I am new to Django and am ready to imitate a simplified segfmentfault website. Now I have a few questions. {Co...

From [MySQLdiscussion group] 2017-06-30 09:53:50 0  1  1108

About designing a function that increments a field in mysql.

I have a simple table with three fields, tag_id, user_id, user_tag_id. I want when I insert a record (insertin...

From [MySQLdiscussion group] 2017-06-28 09:23:38 0  2  1108

Regarding the issue that dates cannot contain zero values ??in higher versions of MySQL

Export the database from MySQL5.6 version and then import it into MySQL5.7. The error message is: Invalid defa...

From [MySQLdiscussion group] 2018-10-12 20:32:12 0  0  1106

mysql 怎么查詢一年的數(shù)據(jù)

有一個需求，請大神指教下，要做個一年折線圖報表，這就要一下查詢一年的數(shù)據(jù)，然后根據(jù)12個月顯示量比如 2015-10-01 00:00:00 到 2016-10-01 00:00:00 查詢這個時間范圍數(shù)據(jù)，然后統(tǒng)計下每...

From [MySQLdiscussion group] 2016-11-05 13:15:25 0  1  1106

MySQL How to select date from a datetime type field

There is a field created_at of datetime type. How to select data on a specific date? {Code...} {Code...} are a...

From [MySQLdiscussion group] 2017-06-30 09:53:42 0  5  1105

SQLAlchemy 對象進行 JSON 序列化, 有什么好的方法( 集思廣益 )?

將 SQLAlchemy 對象, 轉(zhuǎn)化為Python-dict, 或者序列化成 JSON, 主要實現(xiàn):to_dict()to_json()我自己實現(xiàn)了一種做法, 但是總感覺還有些問題( 但是又說不清楚 ), 大家有什么比...

From [MySQLdiscussion group] 2016-11-12 11:09:04 0  1  1105

Try wrapping the CASE/conditional statement inside a MySQL trigger

I have a trigger: CREATETRIGGERMovesAFTERINSERTONRollsFOREACHROWUPDATEPlayersCASEWHENP_Location+NEW.Rolls<1...

From [MySQLdiscussion group] 2023-09-11 20:55:31 0  1  1104

How does mysql determine if the data does not exist and then insert it?

When inserting data, can we merge the following requirements into one SQL statement? 1. Determine whether the ...

From [MySQLdiscussion group] 2017-07-04 13:43:40 0  4  1104