federated authentication

conditional, and the following forms of query statements can take advantage of the multiple-column index:SELECT * FROM Test WHERE last_name= ' Widenius ';SELECT * FROM Test WHERE last_name= ' Widenius ' and first_name= ' Michael ';SELECT * FROM Test WHERE last_name= ' Widenius ' and (first_name= ' Michael ' OR first_name= ' Monty ');SELECT * FROM Test WHERE last_name= ' Widenius ' and first_name >= ' M ' and first_name Query statements in the following form do not take advantage of multiple col

the columns that are common to each table.Left connectionThe result set for the left join includes all rows from the left table specified in the IEFT clause, not just the rows that match the joined columns. If a row in the left table does not have a matching row in the right table, all select list columns in the right table in the associated result set row are null values.Left JOINSelect A.* , B.* from A leftjoinon= B.colnameRight connectionThe right connection is the reverse connection of the

SELECT * FROM teacher--Joint query--01.union (also set)Select TNO from teacher where tno>1080 union(select TNO from teacher where tno>1090)--02.union all (set and show duplicate data)Select TNO from teacher where tno>1080 union ALL(select TNO from teacher where tno>1090)--03.minus (complement) a minus B a A is equivalent to removing duplicate data to ensure that A's return is greater than the range of BSelect TNO from teacher where tno>1080 minus(select TNO from teacher where tno>1090)--04.inter

I define this as a union query, or a query:1th type: SELECT a.gbname,b.gcontent from Tb_goodsbrand a,tb_goods b WHERE a.gbid = B.gbidThe result is:#========================================================================We are using left join to query:2nd type: SELECT a.gbname,b.gcontent from Tb_goodsbrand a left JOIN tb_goods b on a.gbid = B.gbidThe result is:Summary: The 1th type is to satisfy all the conditions behind the where, only to show it;The 2nd kind is the left connection, the left is

1. Three-table joint query select Xx,xx from a, B, C Cartesian product, equivalent to cross join 4. Cross join--lists all combinations on both sides, also called Descartes set A.rows * b.rowsselect *from Sales S Cross join Customers C 5. INNER JOIN = join--Both sides are filtered out select *from Sales S inner JOIN Customers Con s.cust_id = c.cust_id 2. Left join = outer join--with the table on the main table, lists all records of the primary table, matches the match, matches with null list sele

Label:1. SQLite Multi-Table Update method UPDATE TA SET col1=tb.col1 from tableA tA INNER JOIN tableB TB on Ta.col2=tb.col2 This is a very simple batch update statement in SQL Server that supports this syntax but is not supported in SQLite, which can be converted to the following syntax: UPDATE TableA SET col1= (SELECT col1 from TableB WHERE col2=tablea.col2) 2. SQL Server Multi-table Update method UPDATE {table_name with ( SQL Server Example: UPDATE TA SET ta.col1=tb.col1,ta.col2=tb.col2 from

the database to determine whether to update. Elasticsearch MySQL incremental sync three-table federated script The above briefly said about the ES synchronization data script, but the actual situation is certainly not as simple as the script in the previous article. For example, I now have three tables, two entity tables, and an association table. The approximate implementation is as follows: The bin directory establishes a Statefile.json file: {"Typ

multiple tables may be wrong in the way of sub-join queries. For example, you need to make a multi-table connection, so you enter the following junction query:SELECT t1.id,t2.id,t3.idFrom T1,t2Left JOIN T3 on (t3.id=t1.id)WHERE t1.id=t2.id;But MySQL does not do this, the actual execution of the background is the following statement:SELECT t1.id,t2.id,t3.idfrom T1, (T2 left JOIN T3 on (t3.id=t1.id))WHERE t1.id=t2.id;This is not the effect we want, so we need to enter this:SELECT t1.id,t2.id,t3.i

Mainstream storage Engine:　　INNODB: Recommended use, main engine, using more than 99% of the scene　　TOKUDB: High-speed write use, the daily amount of large write eg:500g can be compressed to 50G. It is applicable to the write of access log, relative MyISAM has transactional, and has good compressibility relative to InnoDB.　　INFORBBRIGHT/INFINIDB,OLAP environment: Inferior storage engine, mainly used in OLAP scene, INFINIDB Community Edition can support formation calculation.Memory: Used as neede

Label:1. Requirements: The number of substitute teachers in class 0115 was obtained, the results were sorted by ascending order, and 0228 classes were obtained, and the results were sorted in descending order. (1) first check the originalclass 0115 andclass 0228 All substitute days, as follows: (2) Use the Union keyword, as follows: (3) Change the record of Han Xin in php0115 class is days =15, as follows:(4) When we go back to using the Union combination query, the problem will occur, as follo

Tags: style blog tar ext width intA federated index is also called a composite index. For composite indexes: MySQL left-to-right uses fields from the index, and a query can use only one part of the index, but only the leftmost section. For example, the index is key index (A,B,C). can support a | a,b| A,b,c 3 combinations to find, but B,c is not supported. The index is very effective when the leftmost field is a constant reference.An index on two or mo

connection1. Concept: An inner join is a join that compares the values of the columns to be joined by comparison operators2. Internal connection: Join or INNER join3.sql statementsSELECT * FROM table1 join table2 on Table1.id=table2.id-------------Results-------------Idnameidscore------------------------------1lee1902zhang2100------------------------------Note: only table1 and table2 columns that match the criteria are returned4. Equivalent (same as the following execution effect)A:select a.*,b

In fact, in MySQL, multi-table joint update is not difficult.Grammar:UPDATE SET col_name1=[, COL_NAME2=EXPR2 ... ][WHERE where_definition]Example:UPDATE SET table1.value=Table2.value, a.type=WHERE table1.sid=Similarly, in SQL Server, it is possible to use federation as a simple implementation:UPDATE SET col1=fromINNERJOIN on t1.col2=However, unfortunately, in SQLite does not support such a syntax, it is not in SQLite does not support multi-table joint update it? Of course not, in fact, SQLite in

,oracle,mysql three databases when updating multiple tables. I tried the SQLite database, Are not successful, I do not know whether to support multi-table updates or what. In this example: We will use the Gqdltks,bztks field data in table GDQLPJ to update data for the same field name in Landleveldata, if the Geo_code field value in Landleveldata is equal to the GDQLPJ field value in LXQDM . SQL Server Syntax:UPDATE{table_name with (| View_name| rowset_function_limited}SET{column_name = {expressi

Preface: When the client fails to carry non-anonymous authentication modes such as Basic Authentication/digest authentication in IIS, the client must provide the corresponding credential. Important Notes: 1. How to generate proxy class When using the WSDL command, you must provide the user name and password connected to the Web service to generate proxy.

1. Startup.Auth.cs fileAdd Property? 1 public static OAuthBearerAuthenticationOptions OAuthBearerOptions { get; privateset; } Add a static constructor? 1 2 3 4 5 6 7 /// /// 构造函数 /// static Startup() { OAuthBearerOptions = new OAuthBearerAuthenticationOptions();} Method added in Configureauth? 1 2 // 使用不记名身份验证app.UseOAuthBearerAuthentication(OAuthBearerOptions); 2. WebApiConfig.cs fileMethod regist

I wonder if you have been so embarrassed: When your page certification is based on a cookie-like approach, such as form,windows integration certification, the following operations sometimes certification failure, authentication (user authentication information) lost, need to log in againAfter the system is logged in normally: First page (pagea.htm): After window.showModalDialog (), the second page pops up

1. Understand the database and create new:1) Open the database and connect to the server.2) service type without tube.3) server name: Make a point "." Indicates that the server is on the local computer and, if it is hosted on someone else's server, enter the server IP address.4) Authentication: If you are Windows authentication, you need administrator privileges. Generally hosted on someone else's server, (

Today, when doing a project, an intermediate table has no primary key, and all of the entities are created without components, resulting in the following error:class for Entity:xxxAs you can see, it indicates that a certain class is an entity that does not specify an identifier, mainly because Hibernate discovers its primary key identity when it scans the entity. Therefore, the primary key identification is added on its class. Because my class is more special, I need to add a

There are three main ways of using Hibernate annotations for federated primary keys:First, the field of the Federated primary key is placed in a single class, which needs to implement the Java.io.Serializable interface and override Equals and Hascode, then annotate the class as @embeddable, and finally in the main class (the class does not contain fields from the Federa