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Execute a statement for every table in a database


Execute a statement for every table in a database

By : ShanePK
Date : November 22 2020, 03:03 PM
With these it helps I have written this procedure to execute statements for every table in a database:
code :
DROP PROCEDURE IF EXISTS sp_forEveryTable;
DELIMITER $$
CREATE PROCEDURE sp_forEveryTable(IN p_schema varchar(50), IN p_stmt varchar(100))
BEGIN

  DECLARE done INT DEFAULT FALSE;
  DECLARE v_tbl varchar(50);
  DECLARE cur CURSOR FOR SELECT table_name FROM information_schema.tables WHERE table_schema = p_schema;
  DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE;

  OPEN cur;

  read_loop: LOOP
    FETCH cur INTO v_tbl;
    IF done THEN
      LEAVE read_loop;
    END IF;

    SET @sql := REPLACE(p_stmt, '?', v_tbl);

    IF (UPPER(p_stmt) LIKE 'SELECT %') THEN
        SET @sql := CONCAT('SELECT "', v_tbl, '", ', SUBSTRING(@sql FROM 7));
    ELSE 
        SELECT v_tbl AS 'Execute statement for following table:';
    END IF;

    PREPARE stmt FROM @sql;
    EXECUTE stmt;
    DEALLOCATE PREPARE stmt;
  END LOOP;

  CLOSE cur;
END $$
DELIMITER ;
CALL sp_forEveryTable('your_database_name', 'ALTER TABLE ? CONVERT TO CHARACTER SET utf8 COLLATE utf8_unicode_ci');


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PHP Warning: SQLite3Stmt::execute(): Unable to execute statement: database is locked

PHP Warning: SQLite3Stmt::execute(): Unable to execute statement: database is locked


By : Ahmad Fleifel
Date : March 29 2020, 07:55 AM
hope this fix your issue Symfony2 stores debug and profiling data in SQLite database (in {root}/app/cache/dev/profiler.db file) and seems like in dev mode you send a lot of requests and it locks SQLite database. If you want to test performance of your application - do not use DEV environment
Get the database table name and execute SQL statement

Get the database table name and execute SQL statement


By : o_Omushroom
Date : March 29 2020, 07:55 AM
seems to work fine I have a generic solution for extracting metadata from NHibernate. See link https://weblogs.asp.net/ricardoperes/nhibernate-metadata.
Prepared statement execute fatal error and variables and database table miss match

Prepared statement execute fatal error and variables and database table miss match


By : xudong
Date : March 29 2020, 07:55 AM
it should still fix some issue I expect some error checking ought to shed light on the problem. Add or die(mysqli_error($con)) after the mysqli_select_db and $con->prepare functions:
code :
require ('includes/db.php');
mysqli_select_db($con, $db_name) or die(mysqli_error($con));
$sql= 'SELECT * FROM Reports';
$stmt = $con->prepare($sql) or die(mysqli_error($con));

$stmt->execute();
$sql= 'SELECT rep_id, rep_date, rep_ledit_date, rep_by, rep_type, department, position, report, rep_to FROM Reports';
$_GET['rep_id']>0;
Creating a JAVA database from code. Statement wont execute and create table?

Creating a JAVA database from code. Statement wont execute and create table?


By : user6205687
Date : March 29 2020, 07:55 AM
Any of those help Depending on the IDE you are using you could manually create the table in a console without going through the trouble of writing it in code. Here are some examples of how you could get the information from the tables.
code :
Connection conn = CreatingDerbyDJB.dbConnection();

            try{
                String query = "INSERT INTO  Items (Name,Color,ItemName,SchoolName, Description) VALUES(?,?,?,?, ?)";
                PreparedStatement pstmt = conn.prepareStatement(query);


                pstmt.execute();
                conn.close();
              }catch(Exception e)
            {
                  e.printStackTrace();
            }       }
import java.sql.Connection;
import java.sql.DriverManager;

import javax.swing.JOptionPane;

public class CreatingDerbyDJB 
{
    public static final String DRIVER = "org.apache.derby.jdbc.EmbeddedDriver";
    public static final String JDBC_URL  = "jdbc:derby:LostAndFoundDB";
    public static Connection dbConnection()
    {
        try
        {
            Class.forName(DRIVER).newInstance();
            Connection c = DriverManager.getConnection(JDBC_URL);
            return c;
        }catch(Exception e)
        {
            JOptionPane.showMessageDialog(null, e);
            return null;
        }
    }
}
MYSQL - Execute procedure to execute statement from table

MYSQL - Execute procedure to execute statement from table


By : user1946534
Date : March 29 2020, 07:55 AM
Hope that helps The statement is not escaped. All single/doubled quotes should be escaped.
code :
update urisegments as s
inner join change_product_ids as p on concat(\'{\"product_id\":\"\', p.old_id, \'\"}\') = s.primary_key_value
set s.primary_key_value = CONCAT(\'{\"product_id\":\', p.new_id, \'\"}\')
where s.app_namespace = \'Shop\' and s.primary_key_value like \'%product_id%\';
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