I have an excel sheet which has a large amount of data. I am using php to insert the data into mysql server. I have two problems 1) I have to update a row if the id already exists, else insert the ...
I am working on a model of social interactions in mice. I have mice and boxes and a simulation that outputs which mouse stays in which box during which time period. The problem is how to obtain, in ...
I have a database table holding 40 million records (table A). Each record has a string a user can search for. I also have a table with a list of character replacements (table B) i.e. i = Y, I = 1 ...