MySQL-将.CSV / Excel文件导入MySQL

Question

How do I do it when I want to Import a csv/excel file but I want the contents to be in a specific column?

I have 6 columns in my database. Let's just call it a, b, c, d, e, f.

I want to insert contents to c, d, e from the excel file. Contents of the column a, b and f would be automatically generated.

I'm using the LOAD DATA INFILE script.

Answer 1

One option is to specify user-defined variables as a target for a fiel, in the place of a column name in the column list at the end of the LOAD DATA statement.

For example (omitting most of the syntax):

LOAD DATA ... 
...     
(@dummy1, @dummy2, c, d, e, @dummy3)

The first field from a line will be assigned to user-defined variable @dummy1, the second field to another user-defined variable, the third, fourth and fifth fields will be assigned to columns c, d, and e (respectively), the sixth field will be assigned to another user-defined variable.

If you want to provide a value for a column that's the result of an expression, you can use the SET clause...

LOAD DATA ... 
...     
(@a, @b, c, d, e, @dummy3) 
SET a = UPPER(@a) 
  , b = STR_TO_DATE(@b,'%m/%d/%Y')
  , f = CONCAT(@a,@b)

---

UPDATE

If you only have three fields in the csv, and you want to assign the first field to column c , the second field value to column d , and the third field value to column e ...

LOAD DATA ...
...
(c, d, e)

It's the position of the column name in the (col_or_user_var,...) list that determines which field value will be assigned to which column. To "skip" a field, assign it to user-defined variable... the field in the file has to be assigned to something, and if you don't want to assign it to a column, the assign it to user-defined variable.

It wasn't clear in your question how many fields were in the file, and which field should be assigned to which column.