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Below you introduce SQL under the use of a variety of resources to determine the existence of the code, the need for friends can refer to, I hope you learn SQL functions and databases can be helpful.Whether the library existsif exists (select * from Master.. sysdatabases where name=n ' library name ')print ' exists 'Elseprint ' NOT EXISTS '-----------------Determine if the name of the table to be created existsif exists (SELECT * from dbo.sysobjects W
To reverse all the table structures in the Oracle database, there are partition tables and non-partition tables. The fields involved include number, data, timestamp, varchar2, and char. So only needle
To reverse all the table structures in the Oracle database, there are partition tables and non-partition tables. The fields involved include number, data, timestamp, varchar2, and char. So only needle
To
SQL queries the example of the table, stored procedure, trigger Creation Time, and last modification time. The creation time is modified.
-- Query creation time -- table select * from sysobjects where id = object_id (n'table name ') and xtype = 'U' -- select * from syscolumns where id = object_id (N '
Oracle tables cannot be exported with SQL scripts if they contain CLOB fields, especially when data backup is required or data import and export is inconvenient. This stored procedure you simply pass in the table name and the results that need to be returned, you can get the executable SQL, directly in PL/SQL to perform the returned results, you can export the da
I believe everyone has met the lock table. I think everyone knows how to unlock the table. However, there are some low-level kill processes. We use stored procedures to implement this function.
I believe everyone has met the lock table. I think everyone knows how to unlock the tabl
Tags: style blog color io data div SP CTI Log--determine if the database existsif exists(Select * fromsys.databaseswhereName= 'Database name')Drop Database [Database name]--determine if a table existsif exists(Select * fromsysobjectswhereId= object_id(N'[table name]') and ObjectProperty(ID, N'isusertable')= 1)Drop Table [Ta
Result set found by SQL :! When the result is queried, return to the memberid((img.ask.csdn.netupload201604111460334280_418554.jpg) table: t_bm_integral! The SQL statement in the first figure shows that a result set contains the memberid and integral fields. now we need to traverse and store in... mysql in this result set.
Result set found by SQL:Table: t_bm_integralThe SQL statement in the first figure shows that a result set contains the membe
Check whether SQL exists-- Determine whether the database existsIf exists (select * from master .. sysdatabases where name = N 'database name ')Print 'exists'ElsePrint 'not exists'----------------- Determine whether the table name to be created existsIf exists (select * from dbo. sysobjects where id = object_id (n' [dbo]. [Table name] ') and OBJECTPROPERTY (id, n'isusertable') = 1)-- Delete a tableDrop
【Recommendation]SQL Server One of the uncommon applications
Obtains the basic information, Field List, and stored procedure parameter list of a table.
-- Establish a personal brand through knowledge sharing.
1. obtain basic table information
Select [tablename] = [Tables]. name, [tableowner] = [
Write the stored procedure for the first time, write well to suppress flexion.set @c_db := (select database());drop procedure if exists alter_tables_engine;delimiter //create procedure alter_tables_engine() begin declare db varchar(64); declare done boolean default 0; declare t varchar(64); declare table_n
Ocialrelation SET lingqi = 1800 WHERE NodeName = shizuname;24 ELSE25/* Otherwise, normal update */26 UPDATE socialrelation SET Lingqi = Lingqi + WHERE NodeName = shizuname;27 END if;28 EN D if;29 FETCH NEXT from RS toShizuname, currentlingqi;31 UNTIL done END repeat;33 34/* Close cursor */35 close rs;36 END Today write a MySQL stored procedures, according to their own needs to traverse a data t
Tags: Create PROCEDURE prctestbypage (@tablename varchar (), @selectfilter varchar (100),
@orderbyfilter varchar, @selectpage int, @pageSize int As begin--The stored procedure begins declare @pkname varchar (100)--Gets the primary key name of the table SELECT @pkname =column_name from I N
Tags: date time traffic from the name DDD package whileGeneral traffic is larger than the Web site, and the request log table is created independently of one table per day. The business needs to add a new column for each table, and for half a day, write a stored procedure li
A newly written SQL code is used in the stored procedure to split input strings and insert them into the table:
I don't know if the efficiency is high? (Please advise)
Declare @ SQL nvarchar (4000)Set @ SQL = Replace (@ Vote, '|', 'Union all select ')Set @ SQL = 'select' + @ SQLSet @ SQL = Replace (@ SQL, 'select', '
SQL statement-obtain the database name, table name, stored procedure, and parameter list
I have been familiar with data transfer services of different databases. To facilitate data import and export, I developed a small tool to export and import data, the SQL statements that involve parameters such as database name and table
For websites with a large access volume, the request log table adds a new column for each table to create a business independently for each table every day. after a long time, the stored procedure is as follows: the log table stru
Use dbname
Sp_changedbowner 'new _ user'Change the owner of the current database.
-- Modify the owner of database objects in batches
Create a stored procedure: changenameIf exists (select * From DBO. sysobjects where id = object_id (n' [DBO]. [changename] ') and objectproperty (ID, n' isprocedure') = 1)Drop procedure [DBO]. [changename]Go
Set quoted_ide
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