[Reprint] support common database differential control instructions to support common database differential control instructions

Support for common database differential control instructions

 

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there is actually oscar Shenzhou Universal Database ..

 

                                                                                             Support for common database differential control instructions

class	item	Oracle	SQLServer 2005(+)	MYSQL 4.x	OSCAR	DB2
service	JDBC port	1521	1433 (requires patch)	3306	2003
Field Type	character	VARCHAR2	VARCHAR	VARCHAR   or TEXT	VARCHAR	VARCHAR
	Numerical	NUMBER	NUMERIC	DECIMAL	NUMERIC/DECIMAL	NUMERIC
	Boolean	NUMBER(1)	NUMERIC(1)	DECIMAL(1)	NUMERIC(1)	NUMERIC
	Date Time	DATE	DATETIME	DATETIME	TIMESTAMP (DATE only store date values)	DATE
function	System function of time	sysdate	getdate()	now()	getdate()   or current_date	current   date
	Long date conversion function	to_date(‘值’,’YYYY-mm-dd hh24:mi:ss’)	'value'	'value'	to_timestamp(‘值’,’YYYY-mm-dd hh24:mi:ss’)	'value'
	Short date conversion function	to_date(‘值’,’YYYY-mm-dd’)	'value'	'value'	to_date(‘值’,’YYYY-mm-dd’)	'value'
SQL syntax	Create fields	ALTER   TABLE …  ADD …	ALTER   TABLE … ADD …	ALTER   TABLE … ADD …	ALTER   TABLE … ADD …	ALTER   TABLE … ADD  COLUMN …
	Modify the field	ALTER   TABLE … MODIFY(…)	ALTER   TABLE … ALTER COLUMN …	ALTER   TABLE … CHANGE …	ALTER   TABLE … ALTER COLUMN …	ALTER   TABLE … ALTER COLUMN …
	Delete field	ALTER   TABLE … DROP COLUMN	ALTER   TABLE … DROP COLUMN …	ALTER   TABLE … DROP …	ALTER   TABLE … DROP …
	Create a table	CREATE   TABLE … ()	CREATE   TABLE … ()	CREATE   TABLE … ()	CREATE   TABLE … ()	CREATE   TABLE … ()
	Create a regular index	CREATE   INDEX … ON … ()	CREATE   INDEX … ON … ()	CREATE   INDEX … ON … ()	CREATE   INDEX … ON … ()	CREATE   INDEX … ON … ()
	Create a unique index	CREATE   UNIQUE INDEX … ON …()	CREATE   UNIQUE INDEX … ON …()	CREATE   UNIQUE INDEX … ON …()	CREATE   UNIQUE INDEX … ON …()	CREATE   UNIQUE INDEX … ON …()
	Delete Index	DROP   INDEX indexname	DROP   INDEX table.indexname	ALTER   TABLE … DROP INDEX indexname	DROP   INDEX indexname	DROP   INDEX indexname

 

other:

DB Provider	SQL Paging Syntax	JDBC URL Sample
Oracle	select * from (select rownum r, t1. * from tableName t1 where other conditions and rownum <(number of lines per page +1 * current) order by id) t2 where t2.r> ((this page -1) * Per the number of rows page)	oracle.jdbc.driver.OracleDriver jdbc:oracle:thin:@192.168.0.3:1521:prj
SQLServer	select * from (select rownum r, t1. * from tableName t1 where other conditions and rownum <(number of lines per page +1 * current) order by id) t2 where t2.r> ((this page -1) * Per the number of rows page)	net.sourceforge.jtds.jdbc.Driver jdbc:jtds:sqlserver://192.168.0.2:1433/finaltest;characterEncoding=gb2312
MYSQL	select * from tableName t1 where other conditions order by id limit returns the offset rows Returns the maximum number of rows Offset start value is 0	com.mysql.jdbc.Driver jdbc:mysql://localhost:3306/aws40_test1?characterEncoding=gb2312
Oscar	select * from   tableName t1 where 其他条件   order by id limit count OFFSET offset count至多返回count行 offset在开始返回第一行之前要忽略的行数	com.oscar.Driver jdbc:oscar://localhost:2003/osrdb
DB2	SELECT   * FROM (Select rownumber() over() as row,taball.* from ( select * from tableName   where 其他条件 order by   id) as taball) AS tabpage WHERE tabpage.row BETWEEN 起始行数 AND 结束行数	com.ibm.as400.access.AS400JDBCDriver jdbc:as400://172.16.16.7/AWS

                                                                                             支持常见数据库差异对照说明

类	项	Oracle	SQLServer 2005(+)	MYSQL 4.x	OSCAR	DB2
服务	JDBC端口	1521	1433(需要补丁)	3306	2003
字段类型	字符	VARCHAR2	VARCHAR	VARCHAR   or TEXT	VARCHAR	VARCHAR
	数值	NUMBER	NUMERIC	DECIMAL	NUMERIC/DECIMAL	NUMERIC
	布尔	NUMBER(1)	NUMERIC(1)	DECIMAL(1)	NUMERIC(1)	NUMERIC
	日期时间	DATE	DATETIME	DATETIME	TIMESTAMP (DATE只能存储日期值)	DATE
函数	系统时间函数	sysdate	getdate()	now()	getdate()   or current_date	current   date
	长日期转换函数	to_date(‘值’,’YYYY-mm-dd hh24:mi:ss’)	‘值’	‘值’	to_timestamp(‘值’,’YYYY-mm-dd hh24:mi:ss’)	‘值’
	短日期转换函数	to_date(‘值’,’YYYY-mm-dd’)	‘值’	‘值’	to_date(‘值’,’YYYY-mm-dd’)	‘值’
SQL语法	创建字段	ALTER   TABLE …  ADD …	ALTER   TABLE … ADD …	ALTER   TABLE … ADD …	ALTER   TABLE … ADD …	ALTER   TABLE … ADD  COLUMN …
	修改字段	ALTER   TABLE … MODIFY(…)	ALTER   TABLE … ALTER COLUMN …	ALTER   TABLE … CHANGE …	ALTER   TABLE … ALTER COLUMN …	ALTER   TABLE … ALTER COLUMN …
	删除字段	ALTER   TABLE … DROP COLUMN	ALTER   TABLE … DROP COLUMN …	ALTER   TABLE … DROP …	ALTER   TABLE … DROP …
	创建表	CREATE   TABLE … ()	CREATE   TABLE … ()	CREATE   TABLE … ()	CREATE   TABLE … ()	CREATE   TABLE … ()
	创建普通索引	CREATE   INDEX … ON … ()	CREATE   INDEX … ON … ()	CREATE   INDEX … ON … ()	CREATE   INDEX … ON … ()	CREATE   INDEX … ON … ()
	创建唯一索引	CREATE   UNIQUE INDEX … ON …()	CREATE   UNIQUE INDEX … ON …()	CREATE   UNIQUE INDEX … ON …()	CREATE   UNIQUE INDEX … ON …()	CREATE   UNIQUE INDEX … ON …()
	删除索引	DROP   INDEX indexname	DROP   INDEX table.indexname	ALTER   TABLE … DROP INDEX indexname	DROP   INDEX indexname	DROP   INDEX indexname

 

其他：

DB Provider	SQL分页语法	JDBC URL Sample
Oracle	select   * from (select rownum r,t1.* from tableName t1 where 其他条件 and rownum <(当前页*每页行数+1) order by id) t2   where t2.r>((当前页-1)*每页行数)	oracle.jdbc.driver.OracleDriver jdbc:oracle:thin:@192.168.0.3:1521:prj
SQLServer	select   * from (select rownum r,t1.* from tableName t1 where 其他条件 and rownum <(当前页*每页行数+1) order by id) t2   where t2.r>((当前页-1)*每页行数)	net.sourceforge.jtds.jdbc.Driver jdbc:jtds:sqlserver://192.168.0.2:1433/finaltest;characterEncoding=gb2312
MYSQL	select   * from tableName t1 where 其他条件   order by id limit 返回记录行的偏移量,返回记录行的最大数目 偏移量起始值为0	com.mysql.jdbc.Driver jdbc:mysql://localhost:3306/aws40_test1?characterEncoding=gb2312
Oscar	select * from   tableName t1 where 其他条件   order by id limit count OFFSET offset count至多返回count行 offset在开始返回第一行之前要忽略的行数	com.oscar.Driver jdbc:oscar://localhost:2003/osrdb
DB2	SELECT   * FROM (Select rownumber() over() as row,taball.* from ( select * from tableName   where 其他条件 order by   id) as taball) AS tabpage WHERE tabpage.row BETWEEN 起始行数 AND 结束行数	com.ibm.as400.access.AS400JDBCDriver jdbc:as400://172.16.16.7/AWS