mysql vs sql server

1. Install MySQL ODBC driver on SQL Server side2. Add MySQL to an ODBC data source (Control Panel \ All Control Panel items \ Administrative Tools)To add a configuration driver to a User DSN and System DSNNote: The character set must correspond to the MySQL

As long as interaction is involved, it will certainly deal with data. Maybe there is not much such content on the Internet, no matter how many, each summary is experience-based, and is carefully prepared, it may be for your future use without being forgotten, or for sharing resources, learning together, and making progress together. The following is a summary of the query statements used to extract 10 data records from common databases such as SQL

1. Install and install Mysqlconnector2. Configure MYSQLCONNECTORODBC Data Manager-gt; System dsn-gt; add-gt;mysql ODBC 5.3 ANSI driver-gt; fill in data source Name such as Jt,mysql IP, username, password 3. Create a new linked server exec sp_addlinkedserver@server= ' JT ',--ODBC inside data source name@srvproduct= '

SQL ServerUpdate Tb_user Set "don't add tb_user alias usr from Tb_user usr before pass here." Innerjoinon= addr.naddressid where usr.id =123 MysqlUPDATEMem_world asMw1INNER JOINMem_world asMW2 onMw1.parentid=Mw2.widSEToWS. Level =MW2. Level WHEREMw2.baseid= 107 andMw2.parentid= 0 andMw2.size> 1;One is set and then associated, and the other is the first association and then set.Differences between

firstDeclaretrans_id Varchar2 (100);Begintrans_id: = dbms_transaction.local_transaction_id (TRUE);End--View Transaction ISOLATION LEVELSELECT S.sid, s.serial#,Case Bitand (T.flag, POWER (2, 28))When 0 Then ' READ COMMITTED 'ELSE ' SERIALIZABLE 'END as Isolation_levelFrom V$transaction tJOIN v$session s on t.addr = s.taddr and S.sid = Sys_context (' USERENV ', ' Sid ');SQL ServerThe default system transaction isolation level is read Committed, which r

OracleSELECT * FROM (select rownum r,t1.* from tablename t1 where rownum Description: Filter The N records from the TableName table, starting with the M record.Mysql:SELECT * FROM tablename limit n,m;Description: Filtered from the TableName table, starting with the nth record and filtering out the M record.Note: The record position starts at 0.Sql server:Select Top n * from TableName;Description: Filters out the top N records from the TableName table.

) on st.uid=su.uid and su.name= ' sys '--inner JOIN syscolumns S (NOLOCK) on c.[object_id]=s.idWHERETs.name= ' {0} 'ORDER byC.id ASC "; #MySQLprivate string sqltablelist_mysql = @ "Selecttable_name as NAME,Table_comment as DescriptionFromInformation_schema. TABLESWHERETable_schema= ' {0} '; private string sqlfieldlist_mysql = @ "Selectcolumn_name as NAME,Data_type as TYPE,Ifnull (character_maximum_length,0) as MaxLength,(Case is_nullable if ' NO ' then 0 ELSE 1 END) as isnullable,As Isidentity,C

How SQL Server, MySQL gets the connection stringSteps:First, create a new text document Xxx.txt, modify the file type to. udlSecond, open the document, in the "provide data" to find the corresponding services.Third, select the required database in the connection and fill in the relevant information.Iv. Test Connection, if successful then skip to the next step, fa

) and "nonclustered Indexes" (for MyISAM engines), primary key index, and level two index.The index structure in the MySQL InnoDB engineIn the primary key index, the leaf node contains the data row (data page), the leaf interface of Level Two index, the key value of the primary key index (the primary key index)The index structure in the MySQL MyISAM engineThere is not much difference between the primary key

Tags: style HTTP color using data 2014 database SQLA Web site was previously made with ASP, and the database used was SQL Server, which now intends to use the Php+mysql architecture. Because the original site has a certain ranking, the direct revision of the words, will lead to a lot of error pages, the site rankings and results to recover from a long time, and t

Tags: database Add delete Modify index foreign key columnSummary of MySQL, SQL Server, Oracle Three database maintenance indexes, foreign keys, field syntax1. mysql database 1) Create an indexCREATE INDEX index_name on table_name (column_list)CREATE UNIQUE INDEX index_name on table_name (column_list)To modify a table b

Tags: UI requires visit space app to access key ISS passwordThe actual requirements in the project, you need to write a gadget to import the original SQL Server old database into the MySQL database on the new system at timed time.1, EF entity file generation not to mention, there is no need to pay attention to the place 2. References 3. Configuration files conne

To ensure that SQL server returns the correct value or has performance concerns, it intends to re-compile the execution plan without reusing the execution plan cached in the memory, it is called recompile ). Which of the following conditions can cause re-compilation of the stored procedure? In order to ensure that the correct value or performance concerns are returned, Luo SQLSERVER intends to re-compile th

Label:One: When paging a query, SQL Server uses the top keyword, and MySQL uses the limit e.g: Search for fifth to tenth entry-level staff SQL server2000: Select Top 6 * from EMP where empno not in (select Top 4 empno from emp Order by HireDate) order by HireDate; Mysql: SEL

number of duplicate values and frequent range queries (between, >, 2. is null and IS NOT NULL Null cannot be used as an index. any column containing null values will not be included in the index. Even if there are multiple columns in the index, as long as one of these columns contains null, this column will be excluded from the index. That is to say, if a column has a null value, even if the column is indexed, the performance will not be improved. Any statement optimizer that uses is null o

A recent project involving SQL Server 2008, because of business requirements, wanted to establish a unique index, but found that in SQL Server, a unique index field cannot have multiple null values, and the following is an error message:CREATE UNIQUE nonclustered INDEX on 'dbo. Users'weixin_openid_ui'CREATEUNIQUE T

Oracle Query result set, random sort Copy Code code as follows: SELECT * FROM table1 ORDER by Dbms_random.value (); MySQL randomly query out a record: Copy Code code as follows: --The following query statement is efficient, do not use SELECT * FROM table1 to rand () LIMIT to query select * FROM table1 WHERE id= (select IDs from table1 O Rder by Rand () LIMIT 1) Query result set, random sort Copy Code code as follows:

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MSSQL has launched the image function since 2005. SQLServer images are unreadable. the entire library is in the norecovery mode. SQLServer images can only be 1-to-1, but images and logshipping can be used to achieve one-to-many and image chains. SQLServer Image Authentication is divided into certificates and w SQL Server MSSQL has launched the image function since 2005. The

Understand the number of databases in the current system, the tables contained in each database, and the structure of each table. However, these operations are not developed using SQL standards. The policies adopted by various DBMS are also different, and the interfaces exposed to users are different. The following uses MySQL and SQL