ignore first two characters on a column while importing csv to mysql - mysql

I am trying to import a csv file to mysql table, But I need to remove First two characters on particular column before importing to mysql.
This is my statment :
string strLoadData = "LOAD DATA LOCAL INFILE 'E:/park/Export.csv' INTO TABLE tickets FIELDS terminated by ',' ENCLOSED BY '\"' lines terminated by '\n' IGNORE 1 LINES (SiteId,DateTime,Serial,DeviceId,AgentAID,VehicleRegistration,CarPark,SpaceNumber,GpsAddress,VehicleType,VehicleMake,VehicleModel,VehicleColour,IssueReasonCode,IssueReason,NoticeLocation,Points,Notes)";
Column IssueReasoncode' has data like 'LU12' , But i need to remove the first 2 characters it should have only integers on it and not alpha numeric .
I need to remove 'LU' from that column.
Is it possible to write like this on left(IssueReasonCode +' '2). This column is varchar(45) and cant be changed now because of large data on it.
Thanks


LOAD DATA INFILE has the ability to perform a function on the data for each column as you read it in (q.v. here). In your case, if you wanted to remove the first two characters from the IssueReasonCode column, you could use:
RIGHT(IssueReasonCode, CHAR_LENGTH(IssueReasonCode) - 2)
to remove the first two characters. You specify such column mappings at the end of the LOAD DATA statement using SET. Your statement should look something like the following:
LOAD DATA LOCAL INFILE 'E:/park/Export.csv' INTO TABLE tickets
FIELDS terminated by ','
ENCLOSED BY '\"'
LINES TERMINATED BY '\n'
IGNORE 1 LINES
(SiteId, DateTime, Serial, DeviceId, AgentAID, VehicleRegistration, CarPark, SpaceNumber,
GpsAddress, VehicleType, VehicleMake, VehicleModel, VehicleColour, IssueReasonCode,
IssueReason, NoticeLocation, Points, Notes)
SET IssueReasonCode = RIGHT(IssueReasonCode, CHAR_LENGTH(IssueReasonCode) - 2)


Referencing this and quoting this example , you can try the below to see if it works
User variables in the SET clause can be used in several ways. The
following example uses the first input column directly for the value
of t1.column1, and assigns the second input column to a user variable
that is subjected to a division operation before being used for the
value of t1.column2:
LOAD DATA INFILE 'file.txt' INTO TABLE t1 (column1, #var1) SET
column2 = #var1/100;
string strLoadData = "LOAD DATA LOCAL INFILE 'E:/park/Export.csv' INTO TABLE tickets FIELDS terminated by ',' ENCLOSED BY '\"' lines terminated by '\n' IGNORE 1 LINES (SiteId,DateTime,Serial,DeviceId,AgentAID,VehicleRegistration,CarPark,SpaceNumber,GpsAddress,VehicleType,VehicleMake,VehicleModel,VehicleColour,#IRC,IssueReason,NoticeLocation,Points,Notes) SET IssueReasonCode = substr(#IRC,2) ;";

Related

Is it possible to perform functions during LOAD DATA INFILE without creating a stored procedure?

I have two columns, q1 and q2, that I'd like to sum together and put in the destination column, q.
The way I do it now, I put the data in an intermediate table, then sum during loading, but I'm wondering if it's possible to do it during extraction instead?
Here's my script:
LOAD DATA INFILE 'C:\temp\foo.csv'
INTO TABLE new_foo
FIELDS TERMINATED BY ','
LINES TERMINATED BY '\n'
IGNORE 1 LINES
(q1,q1)
INSERT INTO foo (q) SELECT q1+q2 AS q
FROM foo_temp;

Try:
LOAD DATA INFILE 'C:\temp\foo.csv'
INTO TABLE `foo`
FIELDS TERMINATED BY ','
LINES TERMINATED BY '\n'
IGNORE 1 LINES
(#`q1`, #`q2`)
SET `q` = #`q1` + #`q2`;

Load SQL infile with first column fixed width

I have a plain text file with data like this:
B01-CA This is first data
Z01 This is second data
A56-COL This is third data
So I want to insert these data in a table with 3 columns id, code, name.
I know the syntax:
load data local infile 'C:/codes.txt'
into table tbl_test
fields
terminated by ' '
enclosed by ' '
lines
terminated by '\n'
(code,name);
But how can I take first substring upto 8 charactrs in code column and rest line till '\n' to name column. id is auto increment. Any ideas will help.

I have had the same question.
I have done this:
load data local infile '<file>' into table <table_name> (#row) set code = trim(substr(#row, 0,7)), name = trim(substr(#row, 8))
it works for me

Import CSV into MySQL - Offset by 1 Column

I am importing my data from a csv file like this:
LOAD DATA LOCAL INFILE "c:\myfile.csv" INTO TABLE historic FIELDS TERMINATED BY ',' ENCLOSED BY '"' LINES TERMINATED BY '\n';
This ALMOST works perfect. My table has one different row, the first: An auto incremented id column. Otherwise the csv file and the MySQL table match perfectly. When I run the command above, it puts the first column from the csv into the id field. It want it to actually go into the second.
Is there a way I can modify the above statement to either specify the columns or just offset it by 1? (skipping the first column on import).

You can optionally name the columns to be populated by LOAD DATA, and simply omit your id column:
LOAD DATA LOCAL INFILE "c:\myfile.csv" INTO TABLE historic
FIELDS TERMINATED BY ',' ENCLOSED BY '"' LINES TERMINATED BY '\n'
(column2, colum3, column4, column5, ...)

You can load your data specifing the order columns that you're going to use into your table:
LOAD DATA LOCAL FILE '/tmp/test.txt' INTO TABLE historic
(name_field1, name_field2, name_field3...);
Or if you prefer you can load it first to a temporary table and use a select into statement to laod it into your final table (it's slower).

Import CSV to MySQL With Fewer Columns Than Destination Table

Is there a way to import a CSV into MySQL where the column numbers do not match?
I have a MySQL "Employees" table which we update once a month with a CSV file. I have added two additional columns to the "Employees" table that are relevant to our needs. Importing the table data, through MySQL Workbench, with the following SQL statement:
LOAD DATA LOCAL INFILE 'EmployeeDump-March.csv' REPLACE INTO TABLE employees
FIELDS TERMINATED BY ','
ENCLOSED BY '"'
LINES TERMINATED BY '\n'
I receive the following error, which is absolutely correct... the column numbers don't match:
Error Code: 1261. Row 1 doesn't contain data for all columns 7.426 sec
The two extra fields have default values.
Is there a way to supress this error and have MySQL ignore those last two columns, leaving them alone?

You can (and should!) explicitly name the columns you are inserting into using LOAD DATA INFILE, just like a regular INSERT. You can also optionally set default values for the two new columns you added as part of the LOAD DATA INFILE statement.
Something like this. Just fill in the actual column names in the right order between the parens, and set the actual defaults and column names for the new columns if you don't want NULL:
LOAD DATA LOCAL INFILE 'EmployeeDump-March.csv' REPLACE INTO TABLE employees
FIELDS TERMINATED BY ','
ENCLOSED BY '"'
LINES TERMINATED BY '\n'
(old_column1, old_column2, ...)
set new_column1 = NULL,
new_column2 = NULL

LOAD DATA INFILE id

I ran the following command:
LOAD DATA INFILE '/Users/Tyler/Desktop/players_20120318.txt' INTO TABLE players FIELDS TERMINATED BY ',' LINES TERMINATED BY '\n';
On this data:
PlayerId,IsActive,IsVisible,FirstName,LastName,HeightFeet,HeightInches,Weight,Birthday,Gender,HometownCity,HometownState,HometownZip,HometownCountry,HighSchoolId,HighSchoolIdTemp,HighSchoolGradYear,CollegeYear,Redshirted,Transferred,CollegeId,CollegeIdTemp,CollegeGradYear,OtherAccountId,PreviousCollegeId,CurrentTeamId,LateralRecommendationReason,LateralRecommendationLink,CreationDate,CreatedBy,LastModifiedDate,LastModifiedBy,TwitterLink,FacebookLink,PersonalWebsite,PlayerImage,FirstNameNickName,NeulionID,OtherTeamID,OtherSportTypeID,SourceDataTypeID,PlayerTypeID,LoadID,SameNameTeammate,SameNameSchoolMate,SD_SportID,SD_PlayerID,ZeroNCAAStats,ModifiedByPythonGame,Missing2011,Transfer2011,RecruitingClass
21,True,True,John,Frost,6,1,185,,M,Decatur,AL,35603,,{A0AD8B45-47E1-4039-85DF-756301035073},7453,2009,JR,False,False,{299F909C-88D9-4D26-8ADC-3EC1A66168BB},844,2013,{EBA5A9E6-E03E-4AE5-B9B8-264339EE9259},,0,,,2011-02-16 20:53:34.877000000,,2012-03-08 01:43:37.593000000,{5EBB0160-E69A-4EA2-89D5-932DD4D58632},,,,,,,45759,1,1,5,,,,,,,,,,
1344,True,True,Zach,Alvord,6,0,173,,M,Alpharetta,GA,30022,,{379BF463-67A9-480E-8FFB-9B50AD494953},11597,2010,SO,False,False,{7208C8FB-6780-4379-BC25-5DC5064C85FD},36,2014,{CDACD2C7-7667-406C-9662-02B378B00032},,0,,,2011-02-16 20:53:34.970000000,,2012-03-07 23:28:17.343000000,{5EBB0160-E69A-4EA2-89D5-932DD4D58632},,,,,,,45710,1,1,5,,,,,,,,,,
And mySQL was taking that first column (PlayerID) and assigning it to the id column. It was also shifting everything over one column (first name was filled in with last name).
Is this the expected behavior?

I believe that MySQL will properly insert the data by skipping the id column as long as it's set to auto_increment. Otherwise you can specify the columns individually as Bobby pointed out.

To avoid this problem, specify the columns you're loading data into and leave out the id field:
LOAD DATA INFILE '/Users/Tyler/Desktop/players_20120318.txt' INTO TABLE players (col1, col2, col3...) FIELDS TERMINATED BY ',' LINES TERMINATED BY '\n';