sql all in one for dummies

1 Remove all external check constraints first--Delete all foreign KEY constraintsDECLARE C1 Cursor FORSelect ' ALTER TABLE [' + object_name (parent_obj) + '] drop constraint [' +name+ ']; ‘From sysobjectswhere xtype = ' F 'Open C1DECLARE @c1 varchar (8000)FETCH NEXT from C1 to @c1while (@ @fetch_status =0)BeginEXEC (@c1)FETCH NEXT from C1 to @c1EndClose C1DEALLOCATE C12 Delete

Sample script that is displays all of the users in a given SQL Server DB. Supported platforms SQL Server 2000 Yes Script Code Copy Code code as follows: strdbservername= "." strdbname= "Scriptingguystestdb" setobjsqlserver= CreateObject ("SQLDMO.") SQL Server ") objsqlserver.log

multiple result sets. Using union and UNION all must ensure that the results of each select collection have the same number of columns, and that each column is of the same type. But the column names do not necessarily need to be the same, and Oracle will use the column name of the first result as the column name for the result set. For example, here is an example: Select Empno,ename from empUnionSelect Deptno,dname from DeptWe do not need to use the

SQL: insert all other columns of rows with the same primary key updated. In SQL writing, we often encounter such problems. During each insert operation, you must determine whether the data table already exists. For the same data, all the columns except the primary key are the same. If no data exists, the data is inser

Three keywords in an SQL statement:Minus(Minus ),Intersect(Intersection) andUnion all(Union ); I should have learned the concept of collection in middle school. these three keywords are mainly used to operate the database query results, just as in the Chinese meaning: For two queries, minus subtract the second query result from the first query result, if there is an intersection part, the intersection

in the syntax.\s+from\s+ (\w+) \s+ (\w+) \s+ (Where|left|join|inner) \s+join\s+ (\w+) \s+ (\w+) \s+onFor testing convenience I used the Combox to save the sorted expression, so the code for all tables and aliases is like thisDataTable table =NewDataTable (); Table. Columns.Add ("TableName"); Table. Columns.Add ("aliasname"); foreach(stringStrinch This. Combobox1.items) {Regex reg=NewRegex (str); MatchCollection mces= Reg. Matches ( This. richTextBox

Tags: Tree SQL end-level nodeTarget: Show all end-level nodesIdeas:Determine if there are child nodes based on the count of the parent nodeSource SQLSelect T. " Class_code ", T." Class_name ", T." Father_class_code ", T." Class_state ", T." Op_user ", T." Op_time ", T." Is_project ", NVL (t2.isparent,0) isparent from Fss_project_class T left JOIN ( SELECT count (1) isparent,father_ Class_code from Fss_proje

I want to find all the stored procedures that use sp_a. Right-click the sp_a-viewdependencies-select viewobjectsthatdependon [sp_a] and you will find that sometimes the results cannot be listed in all, not all other stored procedures that use sp_a. I want to find all the stored procedures that use sp_a. Right-click th

SQL parameter format: select * from tb where nd =: nd and yd =: ydTo replace all parameters (with colons) in all SQL statements with data at one time,StartSelect a regular expression.Originally written like thisCopy codeThe Code is as follows:Strsql. replace (/(: \ w +)/g, ("$1"). substring (1 )); "$1" is always parsed

Topics: Listing code for all libraries on SQL Server First: dbo permissions list all databases on the server Copy Code code as follows: Dim SRV Dim Objdb Set srv = Server.CreateObject ("SQLDMO.") SQL Server ") Srv. LoginTimeout = 15 Srv. Connect "127.0.0.1", "Lcx", "LCX" Set objdb = Server.CreateObject (

Tags: entry primary position one of the first methods ESS var numberThe above database tables: CREATE TABLE ' Employees ' (' Emp_no ' int (one) is not NULL,' Birth_date ' date not NULL,' first_name ' varchar (not NULL),' last_name ' varchar (+) not NULL,' Gender ' char (1) Not NULL,' Hire_date ' date not NULL, ------------onboarding timePRIMARY KEY (' emp_no ')); SQL: Query All information about the latest

Tags: end track content SQL declare data time start POS/* query all Sundays @startdate start date @enddate End date in a certain date */ DECLARE @startDate datetime DECLARE @ endDate datetime DECLARE @week varchar set @startDate = ' 20150101 ' set @endDate = ' 20151231 ' while @startDate SQL Server queries all Sun

The following code imports all excle data from the C:\cs\ folder into the SQL databaseDeclare @query VARCHAR (1000)DECLARE @max1 intDECLARE @count1 intDECLARE @filename varchar (100)Set @count1 =0CREATE TABLE #x (name varchar (200))Insert #x exec (' Master.dbo.xp_cmdshell ' dir c:\cs\*.xls/b ')Delete from #x where name is nullSelect IDENTITY (int,1,1) as ID, name into #y from #xdrop table #xSet @max1 = (sel

Tags: Method field BSP name RET COM objects Delete existsWhen a system uses a lot of tables, and there are a lot of stored procedures, when a table in the database deleted a field, then the corresponding stored procedures need to be changed, but we do not know which stored procedures used the field, then what should we do? We can find stored procedures that use the field from one previous document, but this is much more efficient and error-prone, and we can use the following method to find

Tags: on as SQL type Oracle table text class ROMQuery all columns and their properties for a table:Select From User_tab_columns t,user_col_comments Cwhere t.table_name = c.table_name and T.column_name = c.column_name and t.table_name = women;To find the primary key for a table:Find the foreign key of the table (including the name, the table name of the reference table, and the corresponding key name, whi

should I do if I want to delete all records in the SQL Server database? There are two options: 1. delete tables one by one in sequence. This method is unrealistic when there are many tables, even if the number of tables is small, but there are many constraints, you still need to spend a lot of time and energy studying the constraints between them, and then find out which table to delete first, which table

should I do if I want to delete all records in the SQL Server database? There are two options: 1. delete tables one by one in sequence. This method is unrealistic when there are many tables, even if the number of tables is small, but there are many constraints, you still need to spend a lot of time and energy studying the constraints between them, and then find out which table to delete first, which table

In Select The alias created in the list cannot be in Select Used in the clause executed before the clause. In fact, expression aliases cannot be used Select Other expressions in the list. This restriction is caused SQL Another unique feature (All-at-once Operation) . For example Select List, calculate the expressionThe logical order is irrelevant.And hasUncertainty: Select C1 + 1 as E1, C2 + 1 a

-- SQL deletes the primary 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 data tables in the databaseDeclare mycurso

Label:Transferred from: http://www.cnblogs.com/aflyfly/archive/2011/08/10/2133546.html actinium Fly MS SQL Server1. Query All TablesSelect [ID], [name] from [sysobjects] where [type] = ' u ' ORDER by [name]2. Query all databases3. Select [Name] from [sysdatabases] ORDER by [name]Querying fields in a tableSelect [Name] from [syscolumns] where [name] = ' tablexxx '