query to list all tables in oracle database

There may be many tables in a database, and I would like to delete them all if one manual removal is too cumbersome and a waste of time.Two questions involved: 1. How do I know which tables are in this database? 2. How do I read these table names?These two problems have been

DECLARE @cloumns varchar( +)Declare @tablename varchar( +)Declare @str varchar( +)Declare @counts intDeclare @sql nvarchar( -)Declare @str2 nvarchar( -)DeclareMyCursorCursor for SelectA.name asColumns, B.name asTableName fromsyscolumns a,sysobjects b,systypes cwherea.ID=b.id andB.type= 'U' andA.xtype=C.xtype andC.name like '%varchar%'---old values in the databaseSet @str='a392ab5a-9972-46e2-8a32-4afe78ca1076'---new values that need to be updatedSet @str2 = 'a392ab5a-9972-46e2-8a32-4afe78ca1076

ASP. NET dataset facilitates the use of XML files on the page. How can I convert all your data in a database? If your database is compatible with oledb, let's take a look at how to convert all the tables in the database into XML f

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 th

Label:Use test--Delete all (constraint F)DECLARE @countF INTSET @countF = (SELECT COUNT (*) from test.sys.objects WHERE type = ' F ')PRINT ' A total of ' + CAST (@countF as VARCHAR (5)) + ' constraint. ‘While @countF >0BEGINDECLARE @F_Name VARCHAR (50)DECLARE @tbName VARCHAR (50)DECLARE @Cmd VARCHAR (100)DECLARE @parent_Object_ID INTSET @F_Name = (SELECT TOP (1) Name from test.sys.objectsWHERE name in (SELECT t.name from test.sys.objects as [t]) and t

If there are more than two associated tables in an SQL statement, what is the order of connection? ORACLE first connects two tables to generate a result set, and then associates the generated result set with the next table. continue until all tables are connected; finally, w

DECLARE @t varchar(255),@c varchar(255)DeclareTable_cursorcursor for SelectA.name,b.name fromsysobjects a,syscolumns b, systypes cwherea.ID=b.ID andA.xtype='u' andC.name/*"U" is the type of data you want to manipulate, do not change to all data types, don't want to bother to change*/inch('Char','nchar','nvarchar','varchar','text','ntext' /*--here if your text (ntext) type does not have more than 8000 (4000) length, you can use*/)Declare @str varchar

MQT that creates a REFRESH IMMEDIATE type. This table, named EMP, is based on the underlying table EMPLOYEE and DEPARTMENT in the SAMPLE database. Since the REFRESH IMMEDIATE MQT requires at least one unique key from each table referenced within the query to appear in the select list, we first define a uniqueness constraint on the EMPNO column of the EMPLOYEE ta

Use the following stored procedure: If the input table name is used, the table is taken out. If the table name is not used, the entire table structure is selected. If you have any questions, continue to ask me. -- This stored procedure retrieves the field information of the input table. If the table name is blank, it lists information about all the tables in the current

-- Change the smalldatetime column of all tables in the current database to nvarchar (20) -- If the column contains indexes, default values, and other dependencies, it cannot be modified. Exec sp_msforeachtable @ Command1 = N' Declare cur cursor local For Select N'alter table? Alter column'' + Quotename (C. Name) + N'nvarchar (20 )'' From syscolumns C

The SQL statement queries the structure of all tables in the database.

--> Title: delete data in all tables of a user in the database. --> Author: wufeng4552 --> Date: 15:08:41 -- Method 1 Copy codeThe Code is as follows: declare @ uname varchar (20) Declare cuser cursor Select so. name From sysobjects so, sysusers su where so. uid = su. uid and su. name = 'stone' And so. xtype = 'U' Open cuser Fetch next from cuser into @

--> Title: delete data in all tables of a user in the database.--> Author: wufeng4552--> Date: 15:08:41-- Method 1Copy codeThe Code is as follows:Declare @ uname varchar (20)Declare cuser cursorSelect so. nameFrom sysobjects so, sysusers su where so. uid = su. uid and su. name = 'stone'And so. xtype = 'U'Open cuserFetch next from cuser into @ unameWhile (@ fetch_

Traverse all tables in the database and update the values of datetime columns. Declare @ tablename nvarchar (80) declare @ cloumn nvarchar (80) declare @ SQL nvarchar (400) declare c1 cursor scroll forselect table_name, column_name from information_schema.columns where DATA_TYPE = 'datetime' open c1fetch first from c1 into @ tablename, @ cloumnwhile @ fetch_stat

--> Title: delete data in all tables of a user in the database.--> Author: wufeng4552--> Date: 15:08:41-- Method 1Declare @ uname varchar (20)Declare cuser cursorSelect so. NameFrom sysobjects so, sysusers su where so. uid = Su. UID and Su. Name = 'stone'And so. xtype = 'U'Open cuserFetch next from cuser into @ unameWhile (@ fetch_status = 0)BeginExec ('truncate

Hard to import data into the database, but found that forget to create a script to forget PK. Fortunately, the table has a regular, each table has an [ID] int field, PK is built on it. Note: 1 for the readability of the code, not using the ' SQL splicing ' method, but the use of ' first placeholder, after replacement ' method-see the inside of the replace statement. Recommend to everyone 2 because it is executing the DDL, for careful consideration

Tags: Dex objects code and Space Pre ONS table containeSELECTTableName=obj.name,totalrows=Prt.rows,[spaceused (KB)] = SUM(alloc.used_pages)*8 fromsys.objects objJOINSys.indexes IDX onObj.object_id =Idx.object_idJOINSys.partitions PRT onObj.object_id =Prt.object_idJOINSys.allocation_units Alloc onalloc.container_id=prt.partition_idWHEREObj.type= 'U' andidx.index_idinch(0,1)GROUP byObj.name, Prt.rowsORDER by SUM(alloc.used_pages)*8 DESCSQL queries the number of record bars for

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

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

Query all table names: Select T.table_name from User_tables t; Query all field names: Select T.column_name from user_col_comments t; Query all field names for the specified table: Select T.column_name from user_col_comments t