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Add primary key to existing table
... when i have looked all answers. So I research some document to find every detail. Hope this answer can help other SQL beginner.
Reference:https://www.w3schools.com/sql/sql_primarykey.asp
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How to get the type of a variable in MATLAB?
...:
Name: 'double'
Description: ''
DetailedDescription: ''
Hidden: 0
Sealed: 0
Abstract: 0
Enumeration: 0
ConstructOnLoad: 0
HandleCompatible: 0
InferiorClasses: ...
Can I list-initialize a vector of move-only type?
...an answer to Stack Overflow!Please be sure to answer the question. Provide details and share your research!But avoid …Asking for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips o...
What does the red exclamation point icon in Eclipse mean?
...roblems. But it is shown mostly for built problems only. See here for more details. It is about built error decorater seen in eclipse.
An extract from that page:
Build path problems are sometimes easy to miss among other problems in a project. The Package Explorer and Project Explorer views now sh...
How to integrate nodeJS + Socket.IO and PHP?
...an answer to Stack Overflow!Please be sure to answer the question. Provide details and share your research!But avoid …Asking for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips o...
How can I provide multiple conditions for data trigger in WPF?
...an answer to Stack Overflow!Please be sure to answer the question. Provide details and share your research!But avoid …Asking for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips o...
Boost Statechart vs. Meta State Machine
...an answer to Stack Overflow!Please be sure to answer the question. Provide details and share your research!But avoid …Asking for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips o...
What is the cleanest way to disable CSS transition effects temporarily?
...ill animate. I've spent the last hour or two studying this problem in some detail and will post an answer later with fiddles showing cases where the naive approach fails, plus a neat hack that fixes the solution here by forcing a reflow between making the changes and removing the 'notransition' clas...
How does Hadoop process records split across block boundaries?
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Interesting question, I spent some time looking at the code for the details and here are my thoughts. The splits are handled by the client by InputFormat.getSplits, so a look at FileInputFormat gives the following info:
For each input file, get the file length, the block size and calculate ...
How to trigger event when a variable's value is changed?
...an answer to Stack Overflow!Please be sure to answer the question. Provide details and share your research!But avoid …Asking for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips o...