db2命令

Posted 2020-10-09 听哥哥的话

导出ddl
 db2look -d  CESHI1 -e -o db.sql -i db2inst1 -w Coqais011

备份
db2 BACKUP DATABASE dbname
恢复
db2 RESTORE DATABASE dbname
a.服务端安装
b.客户端安装
1.建数据库
create database HRA_GF 
2.建信道
catalog tcpip node gf remote 192.168.2.252 server 50000
3.1 别名
catalog database HRA_GF as hServer at node gf
3.2 数据库挂在信道上
catalog database HRA_GF at node gf
3.3 terminate 刷新
3.4 db2
4.连接数据库
connect to HRA_GF user db2admin using Hhgf2017
5.删除节点
uncatalog node gf

6. 获取序列下一个值
     select nextval for BAS_MODULE_SEQ  from sysibm.sysdummy1
7.创建函数结合序列值获取
   
  7.1 CREATE function BAS_SEQ ()
            RETURNS BIGINT
            LANGUAGE SQL
            CONTAINS SQL
            NO EXTERNAL ACTION
            DETERMINISTIC
            BEGIN ATOMIC
               Declare cd BIGINT;   --时间  
           set cd=next value for BAS_MODULE_SEQ;
            RETURN cd;  
            END ;
  7.2
CREATE  FUNCTION GET_DISCOUNT_FACTOR
(
    v_compute_date  date,
    v_reference_date  date,
    v_index_price_factor_id  bigint
)
RETURNS BIGINT
          LANGUAGE SQL
          NOT DETERMINISTIC
          READS SQL DATA
          STATIC DISPATCH
          CALLED ON NULL INPUT
          EXTERNAL ACTION
          INHERIT SPECIAL REGISTERS
            BEGIN ATOMIC
            Declare RESULT bigint;
    set  RESULT=(select count(1) 
                  from mkt_zero_rate_data
                  where compute_date = v_compute_date
                  and reference_date = v_reference_date
                  and index_price_factor_id = v_index_price_factor_id);

     IF RESULT=0
       then 
       RETURN 0;
       ELSE

         SET RESULT=(
                         select discount_factor   from mkt_zero_rate_data
                                    where compute_date = v_compute_date
                                    and reference_date = v_reference_date
                                    and index_price_factor_id = v_index_price_factor_id);
                                  
           END IF;                         
  return Result;
END;

CREATE  FUNCTION FN_GETFLOWURL(p_createUrl  varchar(255),p_nodeUrl  varchar(255),p_FormCode  varchar(255),p_FormType  varchar(255))
RETURNS varchar(255)
          LANGUAGE SQL
          NOT DETERMINISTIC
          READS SQL DATA
          STATIC DISPATCH
          CALLED ON NULL INPUT
          EXTERNAL ACTION
          INHERIT SPECIAL REGISTERS
            BEGIN ATOMIC
            declare v_pos bigint;
            declare v_tmp bigint;
            declare v_url varchar(255);
         set  v_tmp=(select INSTR(p_nodeUrl,‘.aspx‘) from SYSIBM.SYSDUMMY1);
if v_tmp>0 then
 set v_url = p_nodeUrl;
else --CreateUrl+??Url = ??Url ---??CreateUrl??Node??????(?,&)
 set v_pos=(select INSTR(p_createUrl,‘Node=‘)  from  SYSIBM.SYSDUMMY1);
if v_pos>0 then
 set v_url=SUBSTR(p_createUrl,1,v_pos-2);
else
set v_url=p_createUrl;
end if;
---CreateUrl+??Url??????(?,&)
set v_pos=(select INSTR(v_url,‘?‘)  from  SYSIBM.SYSDUMMY1);
if v_pos>0 then
set v_url= v_url || ‘&‘ || p_nodeUrl;
else
set v_url= v_url || ‘?‘ || p_nodeUrl;
end if;
end if;

set v_url=v_url || ‘&‘||‘FormCode=‘ || p_FormCode || ‘&‘||‘FormType=‘ || p_FormType;
return v_url;
end;
8. 存储过程
CREATE  PROCEDURE PR_INSERT(IN pr_sql  VARCHAR(550))
 LANGUAGE SQL   
 SPECIFIC set_variables  
begin
    execute immediate  pr_sql;
end ;

9.参数化查询
       var info = new QueryInfo();
            info.CustomSQL = "select * from sys_user where user_id=?";
            info.Parameters.Add("user_id", 1002);
            var dt = Dao.ExcuteDataSet(info).Tables[0];
10.load 
load from c:\AA20170828154805.del of del insert into aa

  cmd = cn.CreateCommand();
                cmd.CommandType = CommandType.StoredProcedure;
                cmd.CommandText = @"load from c:\AA20170828154805.del of del insert into aa";
                int ii = cmd.ExecuteNonQuery();

11.非空约束
alter table tableName alter columnName set not null;
12.添加主键
alter table tableName add constraint primary key(主键id)
13.truncate table命令
truncate table tableName immediate;
14.reorg table tableName


15.db2 数据库没有足够大的临时表空间，新建一个足够大的表空间，解决问题
create BUFFERPOOL GFPOOL  SIZE 500 PAGESIZE 32K;
CREATE TEMPORARY TABLESPACE TEMP PAGESIZE 32K MANAGED BY DATABASE USING
(
FILE ‘STEALTH2/TEMP02‘ 128000
) EXTENTSIZE 80 bufferpool GFPOOL;

16.db2分页语法

 
 select * from
 (select t.*,rownumber() over (order by id asc) as rowid from sys_office t) a
 where a.rowid>=1 and a.rowid<=3;
 

17. 不记录日志清空表
alter table TRAN_STRUCTURE activate not logged initially with empty table;

18.查看表id和表空间
select * from syscat.tables where tableid=3852

19.日志设置
update db cfg for ceshi1 using LOGFILSIZ 125000 
20 查看表空间的使用情况
 a.创建表空间
 CREATE TEMPORARY TABLESPACE TEMP PAGESIZE 32K MANAGED BY DATABASE USING
(
FILE ‘STEALTH2/TEMP02‘ 128000
) EXTENTSIZE 80 bufferpool GFPOOL;
 b.list tablespace containers for 1 show detail
 c.扩展表空间 alter  TABLESPACE TEMP add (file ‘/home/db2inst1/db2inst1/NODE0000/CESHI1/004‘ 500m)

20.不记录事务日志
alter table   
  TRAN_TRANSACTION
  --, RSK_BOOK_TRAN_SIMULATION, RSK_LEASE_TRAN_ADJUST, RSK_LEASE_TRANSACTOIN, RSK_TRANSACTION_LOG 
activate not logged initially;
 
 21. 修改数据类型

alter table  ETL_VERIFY_CHECK alter column IS_NOT_NULL set data type int ;
reorg table ETL_VERIFY_CHECK;