In This Page, We List the SQL Syntax for Each of the SQL Commands in This Tutorial, Making This an...

8/9/2019 In This Page, We List the SQL Syntax for Each of the SQL Commands in This Tutorial, Making This an Easy Referen

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In this page, we list the SQL syntax for each of the SQL commands in this tutorial, making this aneasy reference for someone to learn SQL. For detailed explanations of each SQL syntax, please goto the individual section by clicking on the keyword.

The purpose of this page is to have a quick reference page for SQL syntax, so you can learn SQLmore quickly. Bookmark this page now by pressing Control-D so you can have this syntax page

handy.

Select StatementSELECT "column_name" FROM "table_name"

DistinctSELECT DISTINCT "column_name"FROM "table_name"

WhereSELECT "column_name"FROM "table_name"WHERE "condition"

And/Or SELECT "column_name"FROM "table_name"WHERE "simple condition"{[AND|OR] "simple condition"}+

InSELECT "column_name"FROM "table_name"WHERE "column_name" IN ('value1', 'value2', ...)

BetweenSELECT "column_name"FROM "table_name"WHERE "column_name" BETWEEN 'value1' AND 'value2'

LikeSELECT "column_name"

FROM "table_name"WHERE "column_name" LIKE {PATTERN}

Order BySELECT "column_name"FROM "table_name"[WHERE "condition"]ORDER BY "column_name" [ASC, DESC]

CountSELECT COUNT("column_name")

FROM "table_name"

Group By


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SELECT "column_name1", SUM("column_name2")FROM "table_name"GROUP BY "column_name1"

HavingSELECT "column_name1", SUM("column_name2")

FROM "table_name"GROUP BY "column_name1"HAVING (arithematic function condition)

Create Table StatementCREATE TABLE "table_name"("column 1" "data_type_for_column_1","column 2" "data_type_for_column_2",... )

Drop Table StatementDROP TABLE "table_name"

Truncate Table StatementTRUNCATE TABLE "table_name"

Insert Into StatementINSERT INTO "table_name" ("column1", "column2", ...)VALUES ("value1", "value2", ...)

Update StatementUPDATE "table_name"SET "column_1" = [new value]WHERE {condition}

Delete From StatementDELETE FROM "table_name"WHERE {condition}

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SQL WHERE Clause

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The WHERE clause is used to filter records.


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The WHERE Clause

The WHERE clause is used to extract only those records that fulfill a specified criterion.SQL WHERE SyntaxSELECT column_name(s)FROM table_name

WHERE column_name operator value

WHERE Clause Example

The "Persons" table:P_Id LastName FirstName Address City1 Hansen Ola Timoteivn 10 Sandnes2 Svendson Tove Borgvn 23 Sandnes3 Pettersen Kari Storgt 20 Stavanger

Now we want to select only the persons living in the city "Sandnes" from the table above.

We use the following SELECT statement:SELECT * FROM PersonsWHERE City='Sandnes'

The result-set will look like this:P_Id LastName FirstName Address City1 Hansen Ola Timoteivn 10 Sandnes2 Svendson Tove Borgvn 23 Sandnes

Quotes Around Text Fields

SQL uses single quotes around text values (most database systems will also accept double quotes).

Although, numeric values should not be enclosed in quotes.

For text values:This is correct:

SELECT * FROM Persons WHERE FirstName='Tove'

This is wrong:SELECT * FROM Persons WHERE FirstName=Tove

For numeric values:This is correct:

SELECT * FROM Persons WHERE Year=1965

This is wrong:

SELECT * FROM Persons WHERE Year='1965'

Operators Allowed in the WHERE Clause


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With the WHERE clause, the following operators can be used:Operator Description= Equal Not equal> Greater than

< Less than>= Greater than or equal


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In This Page, We List the SQL Syntax for Each of the SQL Commands in This Tutorial, Making This an...

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