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【BLE技术内幕】BLE技术揭秘 - 创客硬件开发 - 清泛IT论坛，有思想、有深度
...是移动智能终端，智能家居，互联设备等领域，主要特点包括：低功耗，使用纽扣电池就可以运行数月至数年。快连接，毫秒级的连接速度，传统蓝牙甚至长达数分钟。远距离，长达数百米的通信距离，而传统蓝牙通常10米左右...
What is the difference between synchronous and asynchronous programming (in node.js)
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@JohnGalt the sql runs on a different thread. But of course that depends on the implementation of the sql driver you use. The driver should spawn a new thread, connect to mysql and run the query. Once done, post the result to the event que...
How can I check MySQL engine type for a specific table?
My MySQL database contains several tables using different storage engines
(specifically myisam and innodb). How can I find out which tables are
using which engine?
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Difference between filter and filter_by in SQLAlchemy
...nyone explain the difference between filter and filter_by functions in SQLAlchemy?
Which one should I be using?
4 Answe...
Insert new column into table in sqlite?
...he way: default value can not be added in ALTER TABLE for some fieldtypes: sqlite.org/lang_altertable.html
– michel.iamit
Sep 9 '13 at 8:00
9
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Create table (structure) from existing table
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Worked for me in MSSQL 2008 R2
– Pyrite
Mar 29 '17 at 14:28
1
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When should I use UNSIGNED and SIGNED INT in MySQL?
When should I use UNSIGNED and SIGNED INT in MySQL ?
What is better to use or this is just personal prefernce ?
Because I've seen it used like this;
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What are the advantages of using a schema-free database like MongoDB compared to a relational databa
I'm used to using relational databases like MySQL or PostgreSQL, and combined with MVC frameworks such as Symfony, RoR or Django, and I think it works great.
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How do I interpret precision and scale of a number in a database?
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Note that MS SQL Server wouldn't allow 12345 or 1234.56 because "[scale] is substracted from [precision] to determine the maximum number of digits to the left of the decimal point." (source: decimal and numeric)
– mo...
How to drop unique in MySQL?
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Simply you can use the following SQL Script to delete the index in MySQL:
alter table fuinfo drop index email;
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