Passing table name as a variable in Mysql query

20 vues (au cours des 30 derniers jours)
Raj Tailor
Raj Tailor le 30 Mar 2019
Hello Experts,
I am trying to pass table name as a variable in mysql query, does anybody knows that is it possible or not?
PS:If I writes table name insead of variable, it works fine.
%I want something like this
datasource='mysql database name';
conn=database(datasource,'',''); %establishing connection to database
tablename='current_records'; %name of mysql table
sqlquery = ['SELECT id FROM ''' tablename ''''];
result = select(conn,sqlquery);
%This one works fine
datasource='mysql database name';
conn=database(datasource,'',''); %establishing connection to database
sqlquery = ['SELECT id FROM current_records'];
result = select(conn,sqlquery);

Réponses (1)

Piyush Kumar
Piyush Kumar le 30 Sep 2024
The issue is with the SQL query string. You should not use single quotes around the table name. Single quotes are used for string literals in SQL, not for identifiers like table names.
tablename='current_records'; %name of mysql table
sqlquery = ['SELECT id FROM ''' tablename ''''];
disp(sqlquery)
SELECT id FROM 'current_records'
Instead, you should use sprintf or proper string concatenation to correctly format the SQL query.
tablename = 'current_records'; % Name of the MySQL table
sqlquery = sprintf('SELECT id FROM %s', tablename);
disp(sqlquery)
SELECT id FROM current_records
tablename = 'current_records'; % Name of the MySQL table
sqlquery = ['SELECT id FROM ', tablename];
disp(sqlquery)
SELECT id FROM current_records

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