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準備 156 個流行的真實世界 SQL 面試問題，並自信地走進面試，對於你會被問的各類型問題胸有成竹。 給面試官留下深刻的印象 測驗包含以下資料庫和 SQL 主題的問題： Databases Core Concepts Normalization (First Normal Form, Second Normal Form, Third Normal Form) Relationships SQL Queries Basics SELECT statement and syntax SQL Data Types WHERE operators: comparison operators, LIKE, BETWEEN, IN Scalar Functions Aggregate Functions (SUM, COUNT, MIN, MAX, AVG) GROUP BY ORDER BY JOINS (INNER JOIN, RIGHT and LEFT JOIN, OUTER JOIN, CROSS JOIN) Set Theory (INTERSECT, UNION, MINUS) Subqueries INSERT, UPDATE, DELETE DML vs DDL vs DCL DDL: CREATE, DROP, ALTER Constraints Indexes DCL privileges: GRANT, REVOKE Transactions Views Triggers Cursors https://softnshare.com/2018/06/09/sql-interview-questions/

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insert by select sql 在軟體開發學習資訊分享 Facebook 的最佳解答

By 軟體開發學習資訊分享

2018-09-04 12:40:00 有 22 人按讚

準備 156 個流行的真實世界 SQL 面試問題，並自信地走進面試，對於你會被問的各類型問題胸有成竹。給面試官留下深刻的印象

測驗包含以下資料庫和 SQL 主題的問題：

Databases Core Concepts
Normalization (First Normal Form, Second Normal Form, Third Normal Form)
Relationships
SQL Queries Basics
SELECT statement and syntax
SQL Data Types
WHERE operators: comparison operators, LIKE, BETWEEN, IN
Scalar Functions
Aggregate Functions (SUM, COUNT, MIN, MAX, AVG)
GROUP BY
ORDER BY
JOINS (INNER JOIN, RIGHT and LEFT JOIN, OUTER JOIN, CROSS JOIN)
Set Theory (INTERSECT, UNION, MINUS)
Subqueries
INSERT, UPDATE, DELETE
DML vs DDL vs DCL
DDL: CREATE, DROP, ALTER
Constraints
Indexes
DCL privileges: GRANT, REVOKE
Transactions
Views
Triggers
Cursors

https://softnshare.com/2018/06/09/sql-interview-questions/

Tags: insert by select sql

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insert by select sql 在 91 敏捷開發之路 Facebook 的最讚貼文

By 91 敏捷開發之路

2017-12-24 11:50:10 有 52 人按讚

有在使用 MS SQL server 的朋友，如果有需要找到 identity 跳號的資料，可以參考一下新的寫法，查詢成本省很大。

#長知識

【SQL Tips】之【了解為何identity會發生不連續號碼與快速找出那些號碼是跳號】20171224

**identity保證唯一，不保證連續**
**使用SARG規則與SET BASED方式找出不連續號碼**
**最後那三種找出不連續的技巧，成本比如下
50%(SELF JOIN搭配NOT IN) : 32%(SELF JOIN搭配 OFFSET 函數) : 18%(LAG 函數) **

許多SQL Server開發人員經常會使用identity自動產生連續編號，然而該identity卻有一個特質是發生交易退回(rollback)則會產生跳號的狀況，以下的狀況就是identity碰到交易退回後所產生的跳號情況。

***
use tempdb
go

if object_id('tblNum') is not null
drop table tblNum
go

create table tblNum
(c1 int identity ,
c2 nvarchar(30) unique --防止重複
)
go

insert into tblNum(c2) values ('lewis1')
insert into tblNum(c2) values ('lewis2')
insert into tblNum(c2) values ('lewis3')
insert into tblNum(c2) values ('lewis3') --重複姓名就發生跳號
insert into tblNum(c2) values ('lewis5')
insert into tblNum(c2) values ('lewis5') --重複姓名就發生跳號
insert into tblNum(c2) values ('lewis5') --重複姓名就發生跳號
insert into tblNum(c2) values ('lewis8')
insert into tblNum(c2) values ('lewis9')
insert into tblNum(c2) values ('lewis10')
go

select * from tblNum
GO

--結果
c1 c2
1 lewis1
2 lewis2
3 lewis3
5 lewis5 <--發生跳號
8 lewis8 <--發生跳號
9 lewis9
10 lewis10
***

基本上單一執行INSERT UPDATE DELETE 就是一種隱性交易，上述的範例就是因為條件約束(constraint)的unique緣故，當輸入的文字發生重複的時候，就會自動退回交易，緊接著identity也隨之發生跳號的狀況。

當瞭解identity會有發生跳號的特質之後，接下來分享三種從SQL Server 2005開始使用的抓取跳號的範例，以及從SQL Server 2012開始支援的Windows Offset函數抓取跳號的技巧。這三種技巧都是使用set-based的方式，不使用WHILE迴圈去比對資料的連續性，值得一試。

**從SQL Server 2005支援的抓取跳號的技巧
--使用自我查詢產生搭配CTE
--使用SET BASED技巧取代迴圈處理

WITH DS AS (
SELECT DS1.* FROM tblNum as DS1 JOIN
tblNum as DS2
on DS1.c1 = DS2.c1+1 )
SELECT * FROM tblNum
WHERE c1 NOT IN (SELECT TOP(1) c1 FROM tblNum ORDER BY c1)
EXCEPT
SELECT * FROM DS
GO

**從SQL Server 2012支援的抓取跳號的技巧
--使用自我查詢產生搭配OFFSET
--使用SET BASED技巧取代迴圈處理
WITH DS AS (
SELECT DS1.* FROM tblNum as DS1 JOIN
tblNum as DS2
on DS1.c1 = DS2.c1+1 ),
DS2 AS (SELECT * FROM tblNum ORDER BY 1 OFFSET 1 ROW )
SELECT * FROM DS2
EXCEPT
SELECT * FROM DS
GO

**從SQL Server 2012支援的抓取跳號的技巧
--使用自我查詢產生搭配LAG的Windows Offset技巧
--使用SET BASED技巧取代迴圈處理
WITH DIFF AS (
select *,LAG(c1, 1,0) OVER ( ORDER BY c1) as previous
,c1 - LAG(c1, 1,0) OVER ( ORDER BY c1) as diff
from tblNum
)
SELECT c1,c2 FROM DIFF WHERE diff>1
GO

--結果就是 5/8 之前就發生跳號
c1 c2
5 lewis5
8 lewis8

最後那三種找出不連續的技巧，成本比如下
50%(SELF JOIN搭配NOT IN) : 32%(SELF JOIN搭配 OFFSET) : 18%(LAG)

Tags: insert by select sql 長知識

91 敏捷開發之路

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我是 Joey Chen，闖蕩江湖的稱號是 91，熱血點火師，專門燃起大家心裡面的熱情與初衷。目前為 Odd-e Taiwan 的負責人，同時也是 JetBrains 在台灣的培訓夥伴，至今也仍是熱愛學習與享受各種程式語言之美的 programmer。身為敏捷教練，擅長 Agile、Scrum、LeSS 等敏捷文化與協作框架的落實與導入，如何讓大家 being agile 而不是 doing agile。同時喜歡結合各家所長，例如 Lean, Kanban 等，重點是持續改善、解決問題、端出成果，而不執著於某種特定方法論或框架。身為技術教練，我也是極限編程（extreme programming）的狂熱者，我擅長用這些技術與工程實踐來提昇產品的品質、團隊的生產力、降低營運風險，因應市場與公司的商業目標，讓團隊能具有高適應與反應能力的基礎建設。例如實例化需求、ATDD、BDD、TDD、重構、自動化單元測試/整合測試/驗收測試、CI/CD、code review、pair programming、mob-programming 等等。同時，我也是推崇極速開發的 developer，追求從想法到產品程式碼的完成，中間的時間差能趨近於零，也就是劍隨心轉，想到哪，程式碼就長到哪的境界。從想法到實現中間的等待，其實在實務上佔了很大的 context switch 成本，如果能讓這段時間縮到最短，就能比其他人多嘗試更多種解決方案，進而挑選出最剛好的方案。同時也是技術社群的活躍份子，從 2010 年開始連任九屆的微軟 MVP，兼任 MSDN 論壇板主，也曾經獲得年度 MSDN 文件庫刊登數量世界第一的榮耀。對微軟技術有愛，對 C# 有愛，對自動測試有愛，對重構與設計模式有愛。近年來對 Java, PHP, Python 也充滿濃厚的興趣，曾帶領客戶團隊中不會寫程式的 QA ，一起用 Python 完成超過百個 mobile UI 自動化測試。擁有超過十年擔任開發團隊 tech leader, trainer, coach 與 mentor 的經驗，進行的企業內部與公開技術培訓課程已超過 100 場，培訓過的開發人員超過 1000 位，擔任研討會與社群活動的講師次數超過 30 次。同時也是技術書籍的作者與譯者，與朋友合著的書籍包含《ASP.NET MVC 5：網站開發美學》、《ASP.NET MVC 4 網站開發美學》，翻譯的書籍有《單元測試的藝術-第二版》、《敏捷開發實踐》、《進入IT產業必讀的200個 .NET面試決勝題》。如果想跟我即時互動，歡迎直接私訊或 email 至 [email protected]。

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insert by select sql 在 prasertcbs Youtube 的最佳解答

By prasertcbs

2020-01-29 18:32:07 有 323 人看過有 6 人喜歡

script สำหรับสร้างตาราง sales;

drop table if exists sales;

create table sales (
branch text,
dt date,
revenue int,
primary key (branch, dt)
);

insert into sales
select 'bangkok' branch, dt::date, (10000 + random() * 20000)::int revenue
from generate_series('2018-01-01'::date, '2019-12-31'::date, '1 day') dt
UNION
select 'phuket' branch, dt::date, (10000 + random() * 10000)::int revenue
from generate_series('2018-01-01'::date, '2019-12-31'::date, '1 day') dt
order by branch, dt;

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You specify the inserted rows by value expressions or the result of a query. Databricks SQL supports this statement only for Delta Lake ...

#54. SQL Server INSERT INTO SELECT语句 - 易百教程

要将其他表中的数据插入另一个表中，请使用以下SQL Server INSERT INTO SELECT 语句： INSERT [ TOP ( expression ) [ PERCENT ] ] INTO target_table (column_list) ...

#55. Inserting Rows into Tables - SAS Help Center

You can also insert the rows resulting from a query. Under most conditions, you can insert data into tables through PROC SQL and SAS/ACCESS ...

#56. INSERT — Trino 364 Documentation

Description#. Insert new rows into a table. If the list of column names is specified, they must exactly match the list of columns produced by the query.

#57. Insert query in SQL - INSERT into sql - Intellipaat

Learn to use Insert query in SQL for inserting records in a table with example - INSERT INTO tablename VALUES (value1, value2,….valueN)

#58. INSERT Statement | Apache Flink

run a single INSERT query on the registered source table and emit the result ... VALUES statement can be used to insert data into tables directly from SQL.

#59. How can insert into a table using values from the same table ...

If it has, the query will fail with a duplicate value error. In such case, you can run a SQL statement like the following: INSERT INTO <table_name>(column1, col.

#60. Insert One or More Rows into a Table - SQL Tutorial - zentut

In this tutorial, you will learn how to use the SQL INSERT statement to ... to select values from another table and supply them to the INSERT statement.

#61. SQLite Insert Into - Inserting New Rows Into a Table

In addition, you can insert a row into a table using data provided by a SELECT statement. SQLite INSERT – inserting a single row into a table. To insert a ...

#62. insert (sql) - InterSystems Documentation

This use of an INSERT statement combined with a SELECT query is commonly used to populate a table with existing data extracted from other tables, as described ...

#63. Insert Into Select Statement in Oracle SQL

I will explain Insert Into Select Statement in Oracle SQL in this post of Oracle SQL Tutorial series.

#64. SQL INSERT INTO SELECT 語句 - it編輯入門教程

SQL INSERT INTO SELECT 語句通過SQL，您可以從一個表複製信息到另一個表。 INSERT INTO SELECT 語句從一個表複製數據，然後把數據插入到一個已存在的表中。

#65. Oracle 用Select 方式Insert Table 資料 - 昭佑.天翔

insert into Table_Name select * from Source_Table;. 用法3. -- 若要"使用* 號, 且要外加其他欄位", 則* 號前面要有table alias name

#66. INSERT/SELECT in Teradata - Forget Code

Although INSERT will be the great option to the users for INSERTing data into a table, INSERT/SELECT will give a better option when you want to insert from ...

#67. Guide on SQL Insert Into Select: Main Tips and Examples

TL;DR – The SQL INSERT INTO SELECT statement can copy some or all columns from one table into another. The existing table rows are not ...

#68. Copying data from one table to another in SQL - jQuery-AZ

We have learned that the INSERT statement is used to enter new records in tables. We also know that the SQL SELECT statement fetches the record-sets from ...

#69. SQL 語法基礎INSERT , SELECT , UPDATE , DELETE - Benjr.tw

與SQL 資料語法相關的有INSERT , SELECT , UPDATE , DELETE ... mysql> INSERT INTO employee (Name , Dept , JobTitle) VALUES ( 'Boss' , 'Testing' ...

#70. How to Use the INSERT Command in SQL Server 2017 - DZone

If you are adding values for all the columns of a table, you do not need to specify the column names in the SQL query. However, make sure that ...

#71. SQL Server: Performance Insert Into vs Select Into - DBA ...

You cited two different articles that discuss two different things. The first article compares insert..select with select into for temporary tables, ...

#72. Advanced SQL: Insert select from {internal entity} | OutSystems

Advanced SQL: Insert select from {internal entity}. Question. SQL. Hi guys,. I have a table that maps which services are available in which ...

#73. SQL 下完Insert Into 之後，取得剛剛Insert 的欄位值(指定返回欄 ...

一直以來只知道下完Insert Into 之後要取得新增後的key 值要用INSERT INTO Test ([name]) VALUES ('jack'); SELECT @@IDENTITY.

#74. SQL Insert Query | SQL INSERT INTO Statement Example

SQL INSERT INTO statement is used to add new values into the database. The INSERT INTO statement adds the new record to the table.

#75. SQL Tutorial => INSERT data from another table using SELECT

Example#. INSERT INTO Customers (FName, LName, PhoneNumber) SELECT FName, LName, PhoneNumber FROM Employees. This example will insert all Employees into the ...

#76. Insert Multiple Records Using One Insert Statement - SQL ...

Update: For SQL Server 2008 there is even better method of Row ... USE YourDB GO INSERT INTO MyTable (FirstCol, SecondCol) SELECT 'First' ,1 ...

#77. INSERT SQL - adds rows to the table - SQLS*Plus

INSERT SQL statement syntax when inserting multiple records into a table. INSERT INTO table (column1, column2, … ) SELECT expression1 ...

#78. SELECT INTO 和INSERT INTO SELECT 两种复制表语句用法 ...

SQL INSERT INTO SELECT 语句通过SQL，您可以从一个表复制信息到另一个表。 INSERT INTO SELECT 语句从一个表复制数据，然后把数据插入到一个已存在的 ...

#79. Insert Statement Without Column List (BP004) | Redgate

Phil Factor demonstrates the problem, and advocates a 'defense-in-depth' approach to writing SQL, in order to avoid it.

#80. How To Insert Data in SQL | DigitalOcean

Structured Query Language, more commonly known as SQL, provides a great deal of flexibility in terms of how it allows ...

#81. How To Insert One or More Rows Into A Table - SQL Tutorial

Copy rows from other tables. You can use the INSERT statement to query data from one or more tables and insert it into another table as follows:.

#82. how to insert new record in my table if not exists?sql server 2005

Yout Sql command is Incorrect , Insert Command doesn't have Where clause. Where Clause is applicable to Update , Select and Delete Commands.

#83. INSERT - Vertica

Specifies a query that returns the rows to insert. ... If a violation occurs, Vertica rolls back the SQL statement and returns an error.

#84. What is SQL Insert Query? How to Insert (Date, Rows, Values ...

What is the Insert Query in SQL? The General Syntax of Insert Command in SQL. How to insert date in SQL Server, multiple rows, and values in a ...

#85. Difference between SELECT INTO and INSERT INTO in MySQL

What is the difference between using SELECT INTO and INSERT INTO? Both can be used to copy data from one table into another.

#86. [MYSQL] 把SELECT的結果INSERT到表中 - 精讚

如果要把`act`表中的的欄位取出後塞到act_stat中，可以下一行完成：. insert into act_stat (catID, cnt) SELECT catID, count( catID ) as cnt FROM ...

#87. How to insert from select query - the ultimate guide - dbHarbor ...

Usually, you use SELECT FROM statement to query data from a table. But there is many ways we can insert data into a table in SQL.

#88. SQL Query - Insert, Select, Update and Delete - DataFlair

Learn various types of SQL Queries like Insert query, select query, update query and delete query with syntax and examples.

#89. INSERT INTO - Amazon Athena

Inserts new rows into a destination table based on a SELECT query statement that runs on a source table, or based on a set of VALUES provided as part of the ...

#90. How to Insert in MySQL - PopSQL

INSERT statements without a column lists are invalidated once a column is added or removed from the table. You need to modify your query to reflect the new or ...

#91. How to Avoid Inserting Duplicate Records in SQL INSERT ...

This article discusses inserting records from another table or tables using an INSERT INTO SELECT statement without duplicate key errors.

#92. Lesson 5: Inserting Into a Table - SQLCourse

From SQLCourse.com: an interactive online training course for SQL beginners. ... After they're inserted into the table, enter select statements to:.

#93. SQL Insert Into and Insert Statements: With Example MySQL ...

To insert a record in a table you use the INSERT INTO statement. ... Note that the entire original query remains intact - we simple add on data ...

#94. How to Use Subqueries in INSERT, UPDATE, and DELETE ...

Do you find subqueries useful in SELECT? Learn how to use them in INSERT, UPDATE, and DELETE and see how powerful your SQL queries can be.

#95. INSERT - Firebird

Field values can be given in the VALUES clause, they can be totally absent (in both cases, exactly one row is inserted), or they can come from a SELECT ...

#96. MySQL INSERT INTO Query: How to add Row in Table ...

The INSERT command can also be used to insert data from one table into another. ... “$query” is the SQL query to be executed.

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