Is there a way to do something like the following ? which doesn't work but shows what I want to do
SET @OutputPath = '/Users/jo/Documents'
SET @fullOutputPath = CONCAT(@OutputPath,'/','filename.csv')
SET @fullOutputPath2 = CONCAT(@OutputPath,'/','filename2.csv')
SELECT * INTO OUTFILE @fullOutputPath
FIELDS TERMINATED BY ','
OPTIONALLY ENCLOSED BY '"'
FROM database.tableName;
SELECT * INTO OUTFILE @fullOutputPath2
FIELDS TERMINATED BY ','
OPTIONALLY ENCLOSED BY '"'
FROM database.tableName2;
Edit: Saving data(e.g. a table) into file without using variable (only constant values)
-- folder_path could could be like => c:/users/sami
-- choose the directory/folder already available in system
-- and make sure you have access to write the file there
SELECT * INTO OUTFILE 'folder_path/filename.csv'
FIELDS TERMINATED BY ','
OPTIONALLY ENCLOSED BY '"'
FROM database.tableName;
Now using variable
Whenever you have to use a variable name in sql, you need dynamic sql (which is applicable in stored procedures only, neither in simple sql query nor in triggers or functions)
SET @OutputPath := 'Users/jo/Documents'; //or any folder_path
SET @fullOutputPath := CONCAT(@OutputPath,'/','filename.csv');
SET @fullOutputPath2 := CONCAT(@OutputPath,'/','filename2.csv');
set @q1 := concat("SELECT * INTO OUTFILE ",@fullOutputPath,
" FIELDS TERMINATED BY ','
OPTIONALLY ENCLOSED BY '\"'
FROM database.tableName");
set @q2 := concat("SELECT * INTO OUTFILE ",@fullOutputPath2,
" FIELDS TERMINATED BY ','
OPTIONALLY ENCLOSED BY '\"'
FROM database.tableName2");
prepare s1 from @q1;
execute s1;deallocate prepare s1;
prepare s1 from @q2;
execute s1;deallocate prepare s1;
As you had both ' and " in your query already, so I concatenated your query using " and used \ to escape your original " to ensure its use as a literal character and not used for concatenation
I just told the use of variable in sql. First You should make sure if your query works like example at the top (without using variable)
Conclusion: If your above query works fine then my told dynamic sql will work as well given that you are using it in some stored procedure.
If you want to do this from bash, i.e. export some data from mysql in csv to a file with dynamic name, it maybe easier and more readable like the following.
The SQL with embedded bash variables:
where (e.timestamp >= ${begin_ts} and e.timestamp < ${end_ts}) order by ed.timestamp ASC ) a
INTO OUTFILE '${export_path}' FIELDS TERMINATED BY ',' ENCLOSED BY '"' LINES TERMINATED BY '\n';
And the bash script that runs the sql file. Notice the envsubst command that evaluates the sql script and substitutes the variables.
#!/bin/bash
mysql_db="dbname"
mysql_user="mysqlpass"
mysql_pass="password"
export_path="./data.csv"
begin_ts="1478278490"
current_ts=$(date +%s -u)
sql=`export_path=${export_path} begin_ts=${last_ts} end_ts=${current_ts} envsubst < export.sql`
mysql $mysql_db -u $mysql_user -p$mysql_pass -e"${sql}"
I have a low carma so I'm posting an answer that should go as a comment to Sami's post - you need to enclose the file name by quotes (note added ' before and after @fullOutputPath):
set @q1 := concat("SELECT * INTO OUTFILE '",@fullOutputPath,
"' FIELDS TERMINATED BY ','
OPTIONALLY ENCLOSED BY '\"'
FROM database.tableName");
You cannot do it in mysql CLI but in this way it works
mysql -e "SELECT * FROM database.tableName;" -u user -p database > filename.csv
SELECT ... INTO OUTFILE, and trying to do that from the shell opens a whole new can of worms :/
SELECT ... INTO OUTFILE is in a stored routine, along with other SELECT that return a resultset (ie CREATE PROCEDURE... BEGIN SELECT 1; SELECT 2 INTO OUTFILE <<dynamicfilename>>; SELECT 3; END
variablebut only usingdynamic sqlinstored procedures