DDL Commands in SQL with Examples Now that we have a basic understanding of DDL commands and their purposes, let's explore some practical examples using the Movies database. CREATE command in SQL When I need to create a new table, I use theCREATE TABLEcommand as seen below: ...
Data Definition Language (DDL) commands are used for defining the database structure or schema. Let's look at some DDL commands with a simple example for each command. i. CREATE In SQL, theCREATE TABLEcommand is used to create a new table in the database. For example, CREATETABLEProducts...
InSQL, different types of commands are categorized based on their functionality. These categories include Data Definition Language (DDL), Data Manipulation Language (DML), Data Control Language (DCL), and Transaction Control Language (TCL). Additionally, understanding these categories helps in effectivel...
DDL statements in SQL primarily consist of the CREATE, ALTER, and DROP commands. Let's take a closer look at each of these commands and their usage.The CREATE command is used to createnew database objects such as tables, views, indexes, and stored procedures. For example, to create a ...
OracleRAC.Valid keyword values are:[Y]andN.CONTENTSpecifies data to load.Valid keywords are:[ALL],DATA_ONLYandMETADATA_ONLY.DATA_OPTIONSData layer option flags.Valid keywords are:SKIP_CONSTRAINT_ERRORS.DIRECTORYDirectory object to be usedfordump,log andSQLfiles.DUMPFILEListofdump files toimport...
Welcometothe MySQL monitor. Commandsendwith;or\g. Your MySQL connection idis6Server version:5.6.35MySQL Community Server (GPL) Copyright (c)2000,2016, Oracleand/orits affiliates.Allrights reserved. Oracleisa registered trademarkofOracle Corporationand/orits ...
1 row in set (0.02 sec) ERROR: No query specified mysql> 从上面表的创建 SQL 语句中,除了可以看到表定义以外,还可以看到表的engine(存储引擎)和charset(字符集)等信息。“\G”选项的含义是使得记录能够按照字段竖着排列,对于内容比较长的记录更易于显示。
Welcome to the MariaDB monitor. Commands end with ; or \g. Your MySQL connection id is 9 Server version: 5.7.18-log MySQL Community Server (GPL) Copyright (c) 2000, 2014, Oracle, MariaDB Corporation Ab and others. Type 'help;' or '\h' for help. Type '\c' to clear the current...
Welcome to the MariaDB monitor. Commands end with ; or \g. Your MariaDB connection id is 2 Server version: 5.5.68-MariaDB MariaDB Server Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others. Type 'help;' or '\h' for help. Type '\c' to clear the current input st...
SQL : Langage de Définition de Données (DDL) BriskTangent558 5 questions SQL DDL: Membuat dan Memodifikasi Skema Basis Data EnergeticLearning 10 questions SQL Data Definition Language (DDL) Quiz ProsperousSeal 16 questions SQL DCL Commands Quiz: DDL, DML, TCL, and DCL in SQL ...