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Tags: type div SSO highlight arc pre rom CAS charTo view locked tablesSelect request_session_id spid,object_name (resource_associated_entity_id) tableName
from sys.dm _tran_locks where resource_type= ' OBJECT '
Unblock a locked table DECLARE @spid int
set @spid = 74-Lock table process
DECLARE @sql varchar
set @sql = ' Kill ' +cast (@spid As varchar)
EXEC (@
SQL parent node to find all child nodes, SQL parent node
How can we save data in a tree structure? Commonly Used in SQL is the parent node method. Create a table as follows:
CREATE TABLE category ( id LONG, parentId LONG, name String(20) )INSERT INTO category VALUES ( 1, NUL
although the result of our previous query was orderly, the new table generated after the run was not sorted by Subprenum and the order was chaotic.It was discovered that this was due to the limitations of SQL Server itself and that if there was a special need to require the data in the staging table to be ordered, the problem could be solved by "creating a clustered Index". For details, please refer to the
SQL query case: convert a column to a row using UNION ALL.
After the conversion of rows and columns, you may encounter the need to replace columns.
Create table TestColRow (Name VARCHAR (10 ),East INT,South INT,West INT,North INT);
Insert into TestColRowVALUES ('zhang san', 1, 2, 3, 4 );
Insert into TestColRowVALUES ('Lee 4', 5, 6, 7, 8 );
Processing with
2.1 obtain the names of all tables in the database.
Sample Data:
Statement:
Select T. Name 'table name' from sysobjects t where objectproperty (T. ID,N 'isusertable') = 1
Or use select name from sysobjects where type = 'U'
Execution result:
2.2 obtain the names of all fields in all
Tags: des style blog http color ar os sp forOriginal: "SQL" counts the rows of all tablesEnvironment:MSSQL ENT 2k8 R2principle: traverse all user tables, get the number of rows per table with the sp_spaceused process, write to the temp table, and finally return to the temporary tableIF object_id('tempdb: #TableRowCount
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
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
Recently, the company's database found that table data has been removed, and some data tables have records of 0. So I want to find out which data tables in the database have records of 0 to narrow the analysis scope, the following SQL statement can be used:
Create
Table # Tmptb (tbname sysname, tbrows
Int
, Tbres
-- SQL deletes the Foreign keys of all user data tables in the database
-- Query all constraints of the current database before deletionSelect * From information_schema.key_column_usage
Declare @ tablename nvarchar (250)-- Declare that the cursor mycursor1 is used to read all
', ' 95 ', ' running ') 7. Query average score?Select AVG (score) as average scoreFrom Student-18. Query the surname Zhang?SELECT * FROM Student-1Where name like ' Zhang% '9. Use truncate to delete all dataTRUNCATE TABLE Student-1 Write so many examples just hope that everyone ingenious, this case is a student score table to do the demonstration, in exchange for other tables, the syntax is the same, this a
) AS BEGIN DECLARE @tbname varchar () Declare Tbroy cursor FOR SELECT Name from sysobjects where xtype= ' u '--the first cursor iterates through all tables open Tbroy fetch next from Tbroy to @tbname while @ @fetch_s Tatus=0 BEGIN DECLARE @colname varchar (DECLARE) Colroy cursor for select name from syscolumns where id=object_ ID (@tbname) and Xtype in (the Select Xtype from systypes where name in (' varcha
Search for the names of all tables with a specific value in the database. You can use the following stored procedure to do this.
Create procedure DBO. findstring@ String nvarchar (100)As
Declare @ SQL nvarchar (4000 );Set @ SQL = N'Declare @ STR nvarchar (4000 );Select@ STR = isnull (@ STR + n'' or ''+ C. Name + n''
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
The following two tables have the same structure. use SQL to find columns with different values.
Student_1
NAME
AGE
SCORE
Peter
26
100
Jack
25
96
Daniel
26
48
Bark
21
69
Student_2
NAME
AGE
SCORE
Peter
26
89
Jack
25
96
Daniel
2
Yonyou software has multiple substations where SQL injection can run all the tables.
UFIDA software second-level domain name:SQL Injection exists, and all tables can be run out.
1. SQL injection point 1-GETHttp: // **. **/serviceh
words, is the partition 3 merged into Partition 4 or partition 4 merged into Partition 3? This needs to see if our partitioning function defines left or right. If you define a ieft. The partition 3 on the other side is merged into Partition 4 on the other side. Instead, the partition 4 is merged into Partition 3:Summary
This article explains how partitioned tables are used in SQL
partitioning column to the clustered index column by default.When partitioning a non-unique nonclustered index, SQL Server adds the partitioning column as an indexed inclusion column by default, to ensure that the index is aligne
varchar are displayed in the database in half. 4 , get the column names contained in the primary key in the table: SELECT syscolumns.name from syscolumns,sysobjects,sysindexes,sysindexkeys WHERE syscolumns.id = object_id (' t Ablename ') and Sysobjects.xtype = ' PK ' and sysobjects.parent_obj = syscolumns.id and sysindexes.id = syscolumns.id and sys Objects.name = sysindexes.name and sysindexkeys.id = syscolumns.id and Sysindexkeys.indid = Sysindexe
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