I am doing an assignment in which there is a requirement that i have to write a sqlite3 script to initialize database and create tables ...
Now i know how to do all this in SQL but not in lite.
Actual statement is as follows
2.1. Create an SQL (text) document mandm_setup.sql!that can be executed from the
SQLite command prompt. This script should include SQL statements that do the
following:
• Appropriately initialise your database
• Create all of the tables in your database design using appropriate data types and
constraints, based on your design
Please Help me out here.
I am stuck
Thanks In advance.
Related
I'm looking for a method or a query to retrieve all tables that are used in a procedure.
I tried information_schema.routinesbut it contains all the definition for a procedure.
Is there any system table that contains the dependency relationship for this ?
Or how can I get table names from the definitions using other language such as Python?
Thanks a lot!!
The current version of MySQL does not implement such a view in INFORMATION_SCHEMA.
MySQL 8.0.13 added I_S.VIEW_TABLE_USAGE, which allows you to look up the tables used by a view. This was done for WorkLog #11864. That WorkLog notes compatibility with PostgreSQL and Microsoft SQL Server.
However, there is no WorkLog I can find for an hypothetical I_S.ROUTINE_TABLE_USAGE table. I checked PostgreSQL, and it has this view: https://www.postgresql.org/docs/current/infoschema-routine-table-usage.html but MySQL does not.
So to get this information automatically, you would have to query the procedure body, and parse it for table references. Not an easy task.
I'm generating a script from an existing MySQL schema using DataGrip's SQL Generator feature. I obtain a working script containing create index statements. I would prefer the indexes to be created by a key clause in the create table statement. I can't see an option in SQL Generator to get that. Do I miss something? I have dozens of tables, so I can't just do it by hand.
The server is a MySQL 5.7.
You can use SQL Generator | Generate: Definitions provided by RDBMS server to get the same result
I found a solution using not the SQL Generator, which doesn't seem to be able to do what I want, but a raw export of the database structure. I select the schema (you can select various and multiple objects: schemas, tables, triggers, produres, functions), on right-click: SQL Scripts -> Request and Copy original DDL, which copies the resulting script extracted from the database. You can then paste it wherever you want, for example a SQL console or a text editor.
I have tried to find an answer for this elsewhere but cannot, I hope someone can help me.
I am trying to import the MySQL sample database into Oracle SQL Developer.
I have an existing database/connection I want to dump it into. I have created an empty table named classicmodels in my existing connection. Yes that name is only 1 table within the sample db, correct. Ignore the error in naming convention.
When I R-click on it and try 'import data' I cannot import a .sql file, I can only do it with XL, CSV, etc.
When I try and run a script it found on dba.stackexchange
#\path\mysqlsampledatabase.sql , I get a series of 'please provide substitution value' messages, which does not make sense to me given that I am importing a database which is built for SQL (ie what reason is there to substitute).
Pictures below:
The 'UnseenCollection' is a single table I imported as a csv file. I need to import the mysqlsampledatabase file such that it shows up the same way, I can access all tables within the sample db.
Anyone can help I would appreciate it. I need the end result to be the entire mysqlsampledatabase to populate within the 'classicmodels' node.
Thank you.
connect to MySQL
connect to Oracle
for a single MySQL table, right-click, 'Copy to Oracle'
for a few tables, select, drag and drop onto Oracle connection (requires newer version of SQL Developer)
for an entire MySQL database, use the migration project feature
I have postponed writing SQL code for university, and now that I want to start learning it, I have no idea how to.
In C I'd define headers and begin with coding main, but in SQL classes all I have is a plain example
CREATE TABLE Sailors(
sid INTEGER,
sname VARCHAR(30) NOT NULL,
rating INTEGER DEFAULT 0,
age REAL DEFAULT 18
)
and some commands for using the table I created.
My questions are: How is a correct script supposed to look? How do I run it to create a database? (MySQL) How do I use MySQL to run scripts and where do I type commands in real time to do stuff I haven't scripted?
I just can't wrap my head around it. All tutorials I've seen use a terminal I can't find, or another I did find and I can't use because I get errors using any command (can't create file in some directory and some modules report errors so it shuts down)
The following is a very vague description of Mysql to get an idea of it:
Mysql (or SQL) is separated in 3 types of language:
DML : Data Manipulation Language
DDL : Data Definition Language
DCL : Data Control Language
Read about them to find out which kind of command belongs where.
You will find out that you almost exclusively need DML and DDL to work with Data in MySQL. While DCL is mostly used to keep the database running, control user privileges , etc.
Also when running code there will be only one command of your script executed at a time without a possibility to point somewhere else in your script.
Loops and Cursors can be used , but have to be stored in a special form of script called stored procedure. Usually you execute your code in a sequence without a code based relation between the different commands (the relation comes from the context of the commands).
Get Data into your Database:
(Consider installing the community edition for MySQL if you have problems running MySQL correctly)
To get Data into your Database , you should import data from files into your database. The MySQL-GUIs available (Workbench, Toad, Navicat, HeidSQL...) usually provide an Import Wizard that makes it easy to import Data from all kind of Files (txt, Excel, Database Files ..).
You can create an excel spreadsheet and import it into your database for example.
here is a picture of the Workbench SQL Editor:
https://dev.mysql.com/doc/workbench/en/images/wb-getting-started-tutorial-adding-data-movies.png
Workbench (or any other GUI) will be your IDE. Getting into it will answer many of your questions.
Regarding the correct script:
A complete MySQL command is called a query.
A Query is defined by a ; at the end (default) .
A chain of MySQL commands is called a script.
Therefore, a correct script consists of correct querys.
To solve more complex problems, use stored procedures in MySQL (this should come close to your usage of the word script).
some MYSQL commands you will have to be familiar with:
select
update
insert into
delete
create table
drop table
alter table
You have a lot to read. But make sure that your Database is running and you have some data in it to test code. As you already have programming experience, you should understand this really fast with the right setup.
Is there a way to export part of MySQL table definition using phpMyAdmin?
I need to transfer 2 columns from one table to other DB, so I expect 2 "ALTER TABLE" SQL commands to be created.
Currently, there is no built in way to do this, but Schema Sync - a MySQL Schema Versioning and Migration Utility can be used:
Schema Sync will generate the SQL necessary to migrate the schema of a source database to a target database (patch script), as well as a the SQL necessary to undo the changes after you apply them (revert script).