Download SQL Server

Data Definition and
Data Types
Managing DBs using IDEs
SoftUni Team
Technical Trainers
Software University
http://softuni.bg
Table of Contents
1. Common data types
2. Creating a database using MySQL / MSSQL
3. Creating a table using MySQL / MSSQL
4. Dropping table using MySQL / MSSQL
5. Altering a table using MySQL / MSSQL
6. Filling a table using MySQL / MSSQL
7. Truncating a table using MySQL / MSSQL
2
Questions
sli.do
#5604
3
Common Data Types
Data type
SQL Server
MySQL
Boolean
Integer
Floating-point
String(fixed)
BIT
INT
FLOAT
CHAR(n)
NCHAR(n)
VARCHAR(n)
NVARCHAR(n)
BINARY(n) (fixed up to 8K)
VARBINARY(n) (<8K)
VARBINARY(max) (>8K & < 2G)
DATE
DATETIME
TINYINT
INT
FLOAT, Double
CHAR(n)
String (variable)
Binary Object
Date
VARCHAR(n)
BINARY(n)
VARBINARY(n)
DATE
DATETIME
4
5
MySQL
Using HeidiSQL
6
SQL Server
Using SSMS
7
8
MySQL
Using HeidiSQL
CREATE TABLE table_name
(
id INT NOT NULL,
name VARCHAR(50) NOT NULL,
age INT
)
9
SQL Server
CREATE TABLE TableName
(
Id INT NOT NULL,
Name VARCHAR(50) NOT NULL,
Age INT
)
Using SSMS
Ctrl + S
10
11
MySQL
Using HeidiSQL
CREATE TABLE table_name
(
P_Id int NOT NULL,
PRIMARY KEY (P_Id)
)
12
SQL Server
Using SSMS
Right click the wanted column
CREATE TABLE TableName
(
P_Id int NOT NULL PRIMARY KEY
)
13
Adding auto increment
MySQL
CREATE TABLE Persons
(
ID int NOT NULL AUTO_INCREMENT,
)
SQL Server
CREATE TABLE Persons
(
ID int IDENTITY PRIMARY KEY
)
14
Adding check constraint
MySQL
CREATE TABLE table_name
(
P_Id INT,
CHECK (P_Id>0)
)
SQL Server
CREATE TABLE TableName
(
P_Id INT CHECK (P_Id>0)
)
15
Adding default value
MySQL
CREATE TABLE table_name
(
City varchar(255) DEFAULT 'Sandnes'
)
SQL Server
CREATE TABLE TableName
(
City varchar(255) DEFAULT 'Sandnes'
)
16
Set unique field
MySQL
CREATE TABLE table_name
(
P_Id INT,
UNIQUE (P_Id)
)
SQL Server
CREATE TABLE TableName
(
P_Id INT UNIQUE
)
17
18
MySQL
Using HeidiSQL
DROP TABLE table_name
19
SQL Server
Using SSMS
DROP TABLE TableName
20
Dropping primary keys
21
MySQL
Using HeidiSQL
ALTER TABLE table_name
DROP PRIMARY KEY
22
SQL Server
Using SSMS
Right click the wanted column
ALTER TABLE TableName
DROP CONSTRAINT
ConstraintName
23
Dropping check constraint
MySQL
ALTER TABLE table_name
DROP CHECK check_name
SQL Server
ALTER TABLE TableName
DROP CONSTRAINT check_name
Dropping default value
MySQL
ALTER TABLE table_name
ALTER column_name DROP DEFAULT
SQL Server
ALTER TABLE TableName
ALTER COLUMN ColumnName DROP DEFAULT
25
Drop unique field
MySQL
ALTER TABLE table_name
DROP INDEX constraint_name
SQL Server
ALTER TABLE TableName
DROP CONSTRAINT ConstraintName
26
27
MySQL
Using HeidiSQL
DROP DATABASE
database_name
28
SQL Server
Using SSMS
DROP DATABASE
DatabaseName
29
30
MySQL
Using HeidiSQL
Add column:
ALTER TABLE table_name
ADD column_name VARCHAR(50)
Delete column:
ALTER TABLE table_name
DROP COLUMN column_name
Modify type of column:
ALTER TABLE table_name
MODIFY COLUMN column_name datatype
31
SQL Server
Using SSMS
Add column:
ALTER TABLE TableName
ADD ColumnName VARCHAR(50)
Delete column:
ALTER TABLE TableName
DROP COLUMN ColumnName
Modify type of column:
ALTER TABLE TableName
ALTER COLUMN ColumnName datatype
32
Altering table and adding
primary keys
33
MySQL/SQL Server
ALTER TABLE table_name
ADD PRIMARY KEY (column(s))
ALTER TABLE table_name
ADD CONSTRAINT constrant_name PRIMARY KEY (column(s))
34
Adding check constraint on altering table
MySQL/SQL Server
ALTER TABLE Persons
ADD CHECK (check condition)
ALTER TABLE Persons
ADD CONSTRAINT check_name CHECK (check condition)
35
Adding default value on alter table
MySQL
ALTER TABLE table_name
ALTER column_name SET DEFAULT
default_value
SQL Server
ALTER TABLE TableName
ALTER COLUMN ColumnName SET DEFAULT
DefaultValue
36
Adding unique field on alter table
MySQL/SQL Server
ALTER TABLE TableName
ADD UNIQUE (column(s))
ALTER TABLE TableName
ADD CONSTRAINT unique_constraint_name UNIQUE (column(s))
37
38
Using HeidiSQL
Click the plus and
enter data
39
Using SSMS
40
41
Erasing Data
TRUNCATE TABLE People
42
Summary
 We can create and modify or delete databases or tables using the
SQL language version in either SQL Server
and MySQL.
 We can easily fill data into our database
using the IDE for the corresponding
technology and later, see the data from the
tables.
43
Data Definition and Data Types
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License
 This course (slides, examples, demos, videos, homework, etc.)
is licensed under the "Creative Commons AttributionNonCommercial-ShareAlike 4.0 International" license
 Attribution: this work may contain portions from

"Databases" course by Telerik Academy under CC-BY-NC-SA license
45
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