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SQL SELECT INTO – Insert Data from Multiple Tables
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Псевдонимы для столбцов
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Insert Data Only in Specified Columns
- Example
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The SQL SELECT TOP Clause
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SQL SELECT INTO Examples
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SQL SELECT INTO – Insert Data from Multiple Tables

In previous examples, we created a table using the SELECT INTO statement from a single table Employee. We can also join multiple tables and use the SELECT INTO statement to create a new table with data as well. In this section, we want to join multiple tables together. In the following query, we joined the following tables together in AdventureWorks2017.

Execute the following query. It gives results from multiple tables based on join condition and columns mentioned.

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SELECT

e.BusinessEntityID

,p.Title

,p.FirstName

,p.MiddleName

,p.LastName

,p.Suffix

,e.JobTitle

,pp.PhoneNumber

,pnt.NameASPhoneNumberType

,ea.EmailAddress

,p.EmailPromotion

,a.AddressLine1

,a.AddressLine2

,a.City

,sp.NameASStateProvinceName

,a.PostalCode

,cr.NameASCountryRegionName

,p.AdditionalContactInfo

FROMHumanResources.Employeee

INNERJOINPerson.Personp

ONp.BusinessEntityID=e.BusinessEntityID

INNERJOINPerson.BusinessEntityAddressbea

ONbea.BusinessEntityID=e.BusinessEntityID

INNERJOINPerson.Addressa

ONa.AddressID=bea.AddressID

INNERJOINPerson.StateProvincesp

ONsp.StateProvinceID=a.StateProvinceID

INNERJOINPerson.CountryRegioncr

ONcr.CountryRegionCode=sp.CountryRegionCode

LEFTOUTERJOINPerson.PersonPhonepp

ONpp.BusinessEntityID=p.BusinessEntityID

LEFTOUTERJOINPerson.PhoneNumberTypepnt

ONpp.PhoneNumberTypeID=pnt.PhoneNumberTypeID

LEFTOUTERJOINPerson.EmailAddressea

ONp.BusinessEntityID=ea.BusinessEntityID;

Execute a query, and we get following the output of the SQL SELECT INTO statement.

We want to create a table with data returned using the above table. Let’s execute the SQL SELECT INTO statement.

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SELECT

e.BusinessEntityID

,p.Title

,p.FirstName

,p.MiddleName

,p.LastName

,p.Suffix

,e.JobTitle

,pp.PhoneNumber

,pnt.NameASPhoneNumberType

,ea.EmailAddress

,p.EmailPromotion

,a.AddressLine1

,a.AddressLine2

,a.City

,sp.NameASStateProvinceName

,a.PostalCode

,cr.NameASCountryRegionName

,p.AdditionalContactInfo

INTOHumanResources.Employee_JoinTables

FROMHumanResources.Employeee

INNERJOINPerson.Personp

ONp.BusinessEntityID=e.BusinessEntityID

INNERJOINPerson.BusinessEntityAddressbea

ONbea.BusinessEntityID=e.BusinessEntityID

INNERJOINPerson.Addressa

ONa.AddressID=bea.AddressID

INNERJOINPerson.StateProvincesp

ONsp.StateProvinceID=a.StateProvinceID

INNERJOINPerson.CountryRegioncr

ONcr.CountryRegionCode=sp.CountryRegionCode

LEFTOUTERJOINPerson.PersonPhonepp

ONpp.BusinessEntityID=p.BusinessEntityID

LEFTOUTERJOINPerson.PhoneNumberTypepnt

ONpp.PhoneNumberTypeID=pnt.PhoneNumberTypeID

LEFTOUTERJOINPerson.EmailAddressea

ONp.BusinessEntityID=ea.BusinessEntityID;

It creates . table and insert data into it. We can verify records in this table by the select statement.

We can see you can join multiple tables together and creates output table using the SELECT INTO statement.

We do not need to take care of defining data types for destination table. If we want to create a table manually, we need to look at data type of each column and define datatype accordingly. If there is a mismatch between data types, you can get an error message like following.

Error 1: Due to a mismatch in data types

Msg 245, Level 16, State 1, Line 1
Conversion failed when converting the varchar value ‘GG’ to data type int.

Error 2: Msg 8152, Level 16, State 30, Line 2

String or binary data would be truncated.

We do not get these errors while inserting data using the SQL SELECT INTO statement. However, we cannot insert data into existing tables using this method.

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Псевдонимы для столбцов

All (transact-sql)all (transact-sql)

Следующий оператор SQL создает два псевдонима, один для столбца CustomerID и CustomerName:

Пример

SELECT CustomerID AS ID, CustomerName AS Customer
FROM Customers;

Следующая инструкция SQL создает два псевдонима.
Обратите внимание, что он требует двойных кавычек или квадратных скобок, если имя псевдонима содержит пробелы:

Пример

SELECT CustomerName AS Customer, ContactName AS
FROM Customers;

Следующий оператор SQL создает псевдоним «Адрес», которые объединяют четыре столбца (адрес, почтовый индекс, города и страны):

Пример

SELECT CustomerName, Address + ‘, ‘ + PostalCode + ‘ ‘ + City + ‘, ‘ + Country
AS Address
FROM Customers;

Примечание: Чтобы получить инструкцию SQL, чтобы работать в MySQL использовать следующие:

SELECT CustomerName, CONCAT(Address,’, ‘,PostalCode,’, ‘,City,’, ‘,Country) AS Address
FROM Customers;

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Insert Data Only in Specified Columns

It is also possible to only insert data in specific columns.

The following SQL statement will insert a new record, but only insert data in the «CustomerName»,
«City», and «Country» columns (CustomerID will
be updated automatically):

Example

INSERT INTO Customers (CustomerName, City, Country)
VALUES (‘Cardinal’, ‘Stavanger’, ‘Norway’);

The selection from the «Customers» table will now look like this:

CustomerID	CustomerName	ContactName	Address	City	PostalCode	Country
89	White Clover Markets	Karl Jablonski	305 — 14th Ave. S. Suite 3B	Seattle	98128	USA
90	Wilman Kala	Matti Karttunen	Keskuskatu 45	Helsinki	21240	Finland
91	Wolski	Zbyszek	ul. Filtrowa 68	Walla	01-012	Poland
92	Cardinal	null	null	Stavanger	null	Norway

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ADD
ADD CONSTRAINT
ALTER
ALTER COLUMN
ALTER TABLE
ALL
AND
ANY
AS
ASC
BACKUP DATABASE
BETWEEN
CASE
CHECK
COLUMN
CONSTRAINT
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CREATE PROCEDURE
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DATABASE
DEFAULT
DELETE
DESC
DISTINCT
DROP
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DROP DEFAULT
DROP INDEX
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EXEC
EXISTS
FOREIGN KEY
FROM
FULL OUTER JOIN
GROUP BY
HAVING
IN
INDEX
INNER JOIN
INSERT INTO
INSERT INTO SELECT
IS NULL
IS NOT NULL
JOIN
LEFT JOIN
LIKE
LIMIT
NOT
NOT NULL
OR
ORDER BY
OUTER JOIN
PRIMARY KEY
PROCEDURE
RIGHT JOIN
ROWNUM
SELECT
SELECT DISTINCT
SELECT INTO
SELECT TOP
SET
TABLE
TOP
TRUNCATE TABLE
UNION
UNION ALL
UNIQUE
UPDATE
VALUES
VIEW
WHERE

MySQL Функции
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ASCII
CHAR_LENGTH
CHARACTER_LENGTH
CONCAT
CONCAT_WS
FIELD
FIND_IN_SET
FORMAT
INSERT
INSTR
LCASE
LEFT
LENGTH
LOCATE
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LTRIM
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POSITION
REPEAT
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RIGHT
RPAD
RTRIM
SPACE
STRCMP
SUBSTR
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TRIM
UCASE
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FROM_DAYS
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LOCALTIME
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MICROSECOND
MINUTE
MONTH
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NOW
PERIOD_ADD
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QUARTER
SECOND
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STR_TO_DATE
SUBDATE
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TIME
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TO_DAYS
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WEEKOFYEAR
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BIN
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CONNECTION_ID
CONV
CONVERT
CURRENT_USER
DATABASE
IF
IFNULL
ISNULL
LAST_INSERT_ID
NULLIF
SESSION_USER
SYSTEM_USER
USER
VERSION

SQL Server функции
Функции строк
ASCII
CHAR
CHARINDEX
CONCAT
Concat with +
CONCAT_WS
DATALENGTH
DIFFERENCE
FORMAT
LEFT
LEN
LOWER
LTRIM
NCHAR
PATINDEX
QUOTENAME
REPLACE
REPLICATE
REVERSE
RIGHT
RTRIM
SOUNDEX
SPACE
STR
STUFF
SUBSTRING
TRANSLATE
TRIM
UNICODE
UPPER
Функции чисел
ABS
ACOS
ASIN
ATAN
ATN2
AVG
CEILING
COUNT
COS
COT
DEGREES
EXP
FLOOR
LOG
LOG10
MAX
MIN
PI
POWER
RADIANS
RAND
ROUND
SIGN
SIN
SQRT
SQUARE
SUM
TAN
Функции дат
CURRENT_TIMESTAMP
DATEADD
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DATEFROMPARTS
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DATEPART
DAY
GETDATE
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MONTH
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YEAR
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CAST
COALESCE
CONVERT
CURRENT_USER
IIF
ISNULL
ISNUMERIC
NULLIF
SESSION_USER
SESSIONPROPERTY
SYSTEM_USER
USER_NAME

MS Access функции
Функции строк
Asc
Chr
Concat with &
CurDir
Format
InStr
InstrRev
LCase
Left
Len
LTrim
Mid
Replace
Right
RTrim
Space
Split
Str
StrComp
StrConv
StrReverse
Trim
UCase
Функции чисел
Abs
Atn
Avg
Cos
Count
Exp
Fix
Format
Int
Max
Min
Randomize
Rnd
Round
Sgn
Sqr
Sum
Val
Функции дат
Date
DateAdd
DateDiff
DatePart
DateSerial
DateValue
Day
Format
Hour
Minute
Month
MonthName
Now
Second
Time
TimeSerial
TimeValue
Weekday
WeekdayName
Year
Другие функции
CurrentUser
Environ
IsDate
IsNull
IsNumeric

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The SQL SELECT TOP Clause

The SELECT TOP clause is used to specify the number of records to return.

The SELECT TOP clause is useful on large tables with thousands of
records. Returning a large number of records can impact performance.

Note: Not all database systems support the SELECT TOP clause. MySQL
supports the LIMIT clause to select a limited number of records, while Oracle uses ROWNUM.

SQL Server / MS Access Syntax:

SELECT TOP number|percent column_name(s)
FROM table_nameWHERE condition;

MySQL Syntax:

SELECT column_name(s)
FROM table_nameWHERE condition
LIMIT number;

Oracle Syntax:

SELECT column_name(s)
FROM table_name
WHERE ROWNUM <= number;

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SQL SELECT INTO Examples

The following SQL statement creates a backup copy of Customers:

SELECT * INTO CustomersBackup2017
FROM Customers;

The following SQL statement uses the IN clause to copy the table into a new
table in another database:

SELECT *
INTO CustomersBackup2017 IN ‘Backup.mdb’
FROM Customers;

The following SQL statement copies only a few columns into a new table:

SELECT CustomerName, ContactName INTO CustomersBackup2017
FROM Customers;

The following SQL statement copies only the German customers into a new table:

SELECT *
INTO CustomersGermany
FROM Customers
WHERE Country = ‘Germany’;

The following SQL statement copies data from more than one table into a new table:

SELECT Customers.CustomerName, Orders.OrderIDINTO CustomersOrderBackup2017
FROM Customers
LEFT JOIN Orders
ON Customers.CustomerID = Orders.CustomerID;

Tip: SELECT INTO can also be used to create a
new, empty table using the schema of another. Just add a WHERE clause that
causes the query to return no data:

SELECT * INTO newtableFROM oldtableWHERE 1 = 0;

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