periscope sql

1. Query all tables in sql: Select table_name from database name. Information_schema. Tables Where table_type= ' BASE table ' is executed, you can see the names of all the tables in the database that belong to you 2. Query all tables and columns in sql:Select Dbo.sysobjects.name as TABLE_NAME, dbo.syscolumns.name as column_name from Dbo.syscolumns INNER JOIN dbo.sysobject s on dbo.syscolumns.id = Dbo.sysobjects.id Where (dbo.sysobjects.xtype = '

' Teacher ' (' Tid ' int (one) not NULL auto_increment,' Name ' varchar (DEFAULT NULL),' job_title ' varchar DEFAULT NULL,' Major ' varchar DEFAULT NULL,PRIMARY KEY (' tid ')) Engine=innodb auto_increment=6 DEFAULT Charset=utf8; Tutor Table Data Insert INTO ' teacher ' (' tid ', ' name ', ' Job_title ', ' major ') values (1, ' Shen ', ' Professor ', ' image '), (2, ' Liu ', ' Professor ', ' database '), (3, ' Yellow ', ' associate Professor ', ' machine learning '), (4, ' Jarvis

1. query all tables in SQL:Select TABLE_NAME FROM database name. INFORMATION_SCHEMA.TABLES Where TABLE_TYPE = 'base table' after execution, you can see the names of all tables created by yourself in the database.2. query all tables and columns in SQL:Select dbo. sysobjects. name as Table_name, dbo. syscolumns. name AS Column_name FROM dbo. syscolumns inner join dbo. sysobjects ON dbo. syscolumns. id = dbo. sysobjects. id Where (dbo. sysobjects. xtype = 'U') AND (NOT (dbo. sysobjects. name LIKE '

Topic: Consumers from Madrid with fewer than 3 orders Build table: Copy Code code as follows: SET NOCOUNT ON--When SET NOCOUNT is on, the count is not returned (representing the number of rows affected by Transact-SQL statements). Returns the count when SET NOCOUNT is off Use SY Go If OBJECT_ID (' dbo. Orders ') is not null DROP TABLE dbo. Orders Go If OBJECT_ID (' dbo. Customers ') is not null DROP TABLE dbo. Customers Go CREATE

Tags: nbsp play clob Introduction ring LAN Solution Help SED 1. Brief introduction Oracle DATABASE11GR1 introduces SQL Planmanagement (SPM), a set of new tools that allow DBAs to capture and maintain discretionary SQL statements to run the best plan, limiting refresh optimizer statistics. There has been an application change. Even the impact of a database version number upgrade. This article helps to unders

Label:The optimization of SQL statements is to convert poorly performing SQL statements into the same performance SQL statements with the same purpose.AI automatic SQL optimization uses AI technology to automatically rewrite SQL statements to find the best-performing equival

Abstract: In the PL/SQL development process, SQL, PL/SQL can be used to meet most of the requirements. However, in some special cases, standard SQL statements or DML statements in PL/SQL cannot meet your needs. For example, dynamic table creation or an uncertain operation mu

Label:The more written the SQL script, the more often it feels that writing is too inefficient, regardless of the speed of the typing. When I personally write SQL scripts, I will at least arrange the SQL format to be easy to read, because others will read your SQL, whether in the program or in the script file, good typ

Use of PL/SQL DBMS_ SQL package (1) (Study Notes), pldbms_ SQL Dbms_ SQL packageThe dbms_ SQL package is another method provided by the system to use dynamic SQL:Follow these steps to use the DBMS_ SQL package to implement dynamic

11. Microsoft SQL server network settingsOverview of Network ServicesSQL Server application interfaceNetwork Connection LibraryNetwork components and SQL server performanceNetwork MonitoringSummaryAfter you install Microsoft SQL Server, you must set its network settings. Up to now, you or your Microsoft Windows NT or Windows 2000 system administrator may have set

SQL join is used to query data from these tables based on the relationship between the columns in two or more tables.Join and KeySometimes in order to get the complete result, we need to get the results from two or more tables. We need to execute the join.Tables in the database can be linked by keys. The primary key (Primary key) is a column, and the value of each row in the column is unique. In the table, the value of each primary key is unique. The

SQL statement optimization improves database performance and SQL statement database performance In systems with unsatisfactory performance, apart from the fact that the application load exceeds the server's actual processing capacity, it is more because the system has a large number of SQL statements that need to be optimized. To achieve stable execution performa

1. SQL InjectionSo far, I have hardly seen anyone who has written a very complete article, or a very mature solution (there are certainly many people who can do it, and the problem is that it has not been spread. Unfortunately) I would like to give a few simple points to inspire everyone to think about and play a role in attracting others. I. Principles of SQL Injection There are many ways to implement and

Tags: primary key first break range Ror add comment art DropSQL PRIMARY KEY ConstraintThe PRIMARY KEY constraint uniquely identifies each record in a database table. The primary key must contain a unique value. Primary key columns cannot contain NULL values. Each table should have a primary key, and each table can have only one primary key.SQL PRIMARY KEY Constraint on CREATE TABLEThe following SQL creates the PRIMARY KEY constraint in the "id_p" colu

Label:Next: T-SQL Dynamic Query (3)--Static SQLObjective: There's a lot of talk about dynamic queries, and this article describes some of the ways to use dynamic SQL to solve dynamic queries.Why use Dynamic sql: in many projects, dynamic SQL is widely used and even misused, and in many cases, dynamic

Today to query their own installed sqlserver2008 is R2 version, search the next, found that a lot of people query this problem, now recorded as follows, through the version of the command queryAlso understand the older brother SQL Server version of the good, a look is very clear, record 1. View SQL Server 2005/2008 version number The code is as follows Copy Code Select SERVERPR

Tags: migrating local SQL Server database to Windows Azure SQL database via SSMs toolMigrate local SQL Server database to Windows Azure SQL database via the SSMs toolMicrosoft's product updates are getting faster, almost every year there are product updates, today, we mainly introduce how to migrate the local

Tags: Microsoft CTI object Complex problem: Lis use parameter BinThis article belongs to theUnderstand the mysteries of performance-slow in applications, fast in SSMS"seriesNext: Understanding the Mysteries of performance-application slow, SSMs fast (5)--case: How to deal with parameter sniffing We put aside the argument sniffing topic and went back to the original point of concern in this series: Why is the statement slow in the application, but fast in ssms? So far, it's all about the stored p

Complex SQL Split optimizationSplitting SQL is one of the most effective methods of performance optimization, which is to break down complex SQL into simple SQL by a certain logic, and finally execute an equivalent logic with the help of temporary tables, and have achieved efficient execution. I've been trying to write

Sharing the SQL area, private SQL area, and game Benchmark 1. Sharing the SQL area is another way to name the handle of the cursor object in Librarycace and the data of the Child heap. Ii. Concept of private SQL zone is stored in PGA in dedicated server mode. (Review the concept of PGA: PGA is allocated on the server s