12/17/2023 0 Comments Mysql create view with multiple tables![]() ![]() Let's call our database " southwind" (inspired from Microsoft's Northwind Trader sample database). A product sales database typically consists of many tables, e.g., products, customers, suppliers, orders, payments, employees, among others. Let us begin with a simple example - a product sales database. A " test" database is provided during installation for your testing. The databases " mysql", " information_schema" and " performance_schema" are system databases used internally by MySQL. You can use SHOW DATABASES to list all the existing databases in the server. ![]() Hence, it is best to treat identifiers as case-sensitive. The names or identifiers (database names, table names, column names, etc.) are case-sensitive in some systems, but not in other systems. For clarity, they are shown in uppercase. The SQL keywords and commands are NOT case-sensitive. A table is made up of columns (or fields) and rows ( records). Each database consists of one or more tables. SHOW WARNINGS - Show the warnings of the previous statement An Example for the Beginners (But NOT for the dummies)Ī MySQL database server contains many databases (or schemas). , columnNValue) - Insert on selected Columns VALUES ( column1Value, column2Value.) - Insert on all Columns SHOW CREATE TABLE tableName - Show the CREATE TABLE statement for this tableName - Row-Level Modify a table, e.g., ADD COLUMN and DROP COLUMNĪLTER TABLE tableName ADD columnDefinitionĪLTER TABLE tableName ADD FOREIGN KEY ( columnNmae) REFERENCES tableName ( columnNmae) ALTER TABLE tableName DROP FOREIGN KEY constraintName SHOW TABLES - Show all the tables in the default databaseĭESCRIBE|DESC tableName - Describe the details for a tableĪLTER TABLE tableName. įOREIGN KEY ( columnNmae) REFERENCES tableName ( columnNmae) SHOW CREATE DATABASE databaseName - Show the CREATE DATABASE statement - Table-LevelĬolumnName columnType columnAttribute. SELECT DATABASE() - Show the default database USE databaseName - Set the default (current) database SHOW DATABASES - Show all the databases in this server Database-LevelĭROP DATABASE databaseName - Delete the database (irrecoverable!)ĭROP DATABASE IF EXISTS databaseName - Delete if it existsĬREATE DATABASE databaseName - Create a new databaseĬREATE DATABASE IF NOT EXISTS databaseName - Create only if it does not exists Summary of MySQL Commands Used in this Tutorialįor detailed syntax, check MySQL manual "SQL Statement Syntax". The if inside the do puts a comma in front of every row except the first one, thus removing the comma at the end of the last record.Read " How to Install MySQL and Get Started" on how to install, customize, and get started with MySQL. $totalRows_Recordset1 = mysql_num_rows($Recordset1) $row_Recordset1 = mysql_fetch_assoc($Recordset1) $Recordset1 = mysql_query($query_Recordset1, $con1) or die(mysql_error()) "' AND lp_pt=lp_dept.id AND lp_plans.week=lp_weeks.id ORDER BY `timestamp` DESC" $query_Recordset1 = "SELECT filename, week, dept, course, lp_scription, lp_weeks.year, lp_sc FROM lp_plans, lp_dept, lp_weeks WHERE username = '". Works great but I am having trouble getting the individual column select filter to work with the JSON data source. What I am doing for now is using a php file to generate JSON code and using the sAjaxSource function. If anyone has some experience and can throw me a bone I would truly appreciate it!! I honestly don't now if I am even on the right track for what I am trying to do. $sWhere = "lp_pt=lp_dept.ID AND lp_plans.week=lp_weeks.ID" $aColumns = array( 'lp_weeks.year', 'lp_sc', 'lp_scription', 'lp_urse', 'lp_plans.filename') "' AND lp_pt=lp_dept.id AND lp_plans.week=lp_weeks.id ORDER BY `timestamp` DESC"įor DataTables I am working from the Data Sources > Server Side Processing example, and was trying to do something like this: SELECT filename, week, dept, course, lp_scription, lp_weeks.year, lp_sc FROM lp_plans, lp_dept, lp_weeks WHERE username = '". Everything works great if I select from a single table in my database, but I really need to select multiple columns from mulitiple tables with WHERE clauses. I am trying to create a table that is getting it's data from MySql. I am very new to DataTables and I am quite frankly amazed at all of it's capabilitites. ![]()
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