1, add table B, same structure as table A (with data)CREATE TABLE B as SELECT * from A;2, add Table B, and the a table structure is the same (without with data)CREATE TABLE B as SELECT * from A where 1=2;3, there is a
Technorati label: before creating a table in PL/SQL, determine whether the table exists.
Delete the execution statement of the table if any.
Since PL/SQL is used for Oracle client operations, since SQL 2005 was used to execute "before creating a table, determine whether the table
Tags: style blog color using data sp div problem cWith the long-term use of MySQL, there will certainly be some problems, in general, the MySQL table can not be accessed, it is possible to repair the table, optimized to reduce disk space, convenient backup. Table table_name // table table_name // optimization table
Scenario 1: The following code defines the table broadband as 600px, the TD broadband is not set, 3 TD content is three-in-one, you can see 3 content divided into the width of table.That is, each TD is 200px (Please note: If you use Chrome to debug the width, there will be some error, because 600px also includes a border, so the actual width may be 198px, here is simplified, the same below).Next, modify the contents of the first TD and change the 1 to
Two sheets of code (I use the plugin, you can go online directly download http://issues.wenzhixin.net.cn/bootstrap-table/):Divclass= "Container"style= "float:left;width:500px;height:341px"> DivID= "Toolbar"> ButtonID= "Remove"class= "Btn Btn-danger"Disabled=""> Iclass= "Glyphicon glyphicon-remove">I>DeleteButton> Div> TableID= "Table"Data-toolbar= "#toolbar"Data-search=
CopyCodeThe Code is as follows: repair table 'table _ name' to repair the table
Optimize table 'table _ name' optimize table
Repair table is used to repair damaged tables.Optimize
Copy codeThe Code is as follows:Repair table 'table _ name' REPAIR tableOptimize table 'table _ name' OPTIMIZE tableRepair table is used to REPAIR damaged tables.Optimize table is used to recycle idle database space. When the data
Code for implementing table fine-line table effects and table fine-line table code
Code for implementing the table thin-line table effect:Compared with the default table of the
Problem Description:Two Tables A and B, each with a field, update time A.MODIFIED_TM and B.modified_tm,a table as the main table, update time is not empty, but the B table update time may be empty, now to take a, B two table time the newest one, b.modified_ If the TM is empty, take A.modified_tm, for example:Table AID
Copy Code code as follows:
REPAIR table ' table_name ' repair form
OPTIMIZE table ' table_name ' optimization tables
The REPAIR table is used to repair damaged tables.
The OPTIMIZE table is used to reclaim unused database space, and when data rows on a table are d
For simpler tables, the amount of data is not a very much table, you can use a simple SQL statement to back up
CREATE TABLE t_fa_cat_20121207 as SELECT * from T_fa_cat
Create a new table and save the data
INSERT INTO T_fa_cat select * from t_fa_cat_20121207
To import the original backed-up data into a table to r
Use [Database]GOSET ANSI_NULLS onGOSET QUOTED_IDENTIFIER ONGOCREATE proc [dbo]. [Table name]AsBeginDECLARE @Keyword varchar (max), @strs varchar (max)--Declaring cursorsDeclare mtf_cursor Cursor for select distinct Keyword from Keywords where flag=4--Open cursorOpen Mtf_cursorFETCH NEXT from Mtf_cursor to @Keyword-moves the cursor down by 1 rows to get the data into the previously defined variable @ @KeywordWhile @ @FETCH_STATUS = 0--Returns the state
CREATE TRIGGER Tr_borrow on borrowAfter INSERTAsIF ((select I.bno from INSERTED I) in (select BNO from BOOKS WHERE bname= ' b002 '))BEGININSERT Borrow_saveSELECT * from INSERTED IPRINT ' has backed up this record 'ENDELSEBEGINPRINT ' did not back up this record 'ENDSQL Written question: Create a trigger on the borrow table to complete the following functions: If the reader borrows the title "b002", the reader's borrowing record is saved in the Borrow_
The original: "Bi thing-the art of data" understanding Dimension Data Warehouse-fact table, dimension table, aggregation tableFact tableIn a multidimensional data warehouse, a table that holds a detailed value or fact for a measure is called a fact table. A fact table that s
Fact tableIn a multidimensional data warehouse, a table that holds a detailed value or fact for a measure is called a fact table. A fact table that stores sales and sales by state, product, and month has 5 columns that are conceptually similar to the following example.
Sate
Product
Mouth
Units
Dollars
WA
Mounta
This article from the following aspects to collate the concept and operation of the partition table:1. Table space and the concept of partitioned tables2. The specific role of table partitioning3. Advantages and disadvantages of table partitioning4. Table partitioning of sev
Tags: independent class filegroup Targe add value physics tell titleIf the data in one of the tables in your database meets the following criteria, you should consider creating a partitioned table. 1. There is a lot of data in a table in the database. What are many concepts? 10,000 lines? 20,000 lines? Or 100,000 or 1 million? This, I think is the question of the benevolent see and the beholder. Of course,
Tags: blog http io ar os using SP for strongpartition table in SQL Server 2005 (a): What is a partitioned table? Why use partitioned tables? How do I create a partitioned table? Category: SQL Server2009-12-03 10:17 15325 People read comments (+) Favorites report SQL Server Database 2010schemefunctionnullIf the data in one of the tables in your database meets
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