troubleshooting Question

How to avoid duplicate record in Mysql

Avatar of xtran007
xtran007 asked on
MySQL Server
3 Comments1 Solution1000 ViewsLast Modified:
I have two questions:

1- My table has duplicate records eg. same symbol,date,time but value is different.  How can I
    delete these duplicate records?

2- How can I modify my table so that whenever I insert a record (index selected based on
    symbol,date,time), the MySQL will reject those have the same index (combination of
   symbol,date,and time)?

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