Table design
- From: Raju Angani <angani@xxxxxxxxx>
- To: ORACLE-L <oracle-l@xxxxxxxxxxxxx>
- Date: Mon, 28 Jan 2013 15:35:36 -0800
Hi,
I have 2 tables in a schema of 800+ tables with column count of 60+. I see
lot of chained rows in all 3 tables.
I'm thinking of restructing the tables as multiple tables, also considering
using cluster(create cluster). read about clustering table not good for lot
of updates.
Could someone help me on the approach on how to handle chained
rows(vertical spit of table), based on my meta data I collected about the
table.
TABLENAME, ROW_COUNT, CHAINED_ROWS
======================================
Table11 15400 14749
Table22 1036 1032
TableT1 917826 12799
TABLENAME, INSERTS, UPDATES, DELETES
======================================
TABLE11 19684 2538181 19707
TABLEPB 294161 1268271 266974
TABLET1 288531 1974731 328134
Table structure
==============
CREATE TABLE TABLE11
(
ID INTEGER NOT NULL,
c1 INTEGER NOT NULL,
c2 NVARCHAR2(440),
c3 NVARCHAR2(255),
c4 INTEGER NOT NULL,
c5 INTEGER DEFAULT 0 NOT NULL,
c6 NUMBER(1) DEFAULT 0 NOT NULL,
c7 NVARCHAR2(255),
c8 INTEGER,
c9 NVARCHAR2(255),
c10 NVARCHAR2(255),
c11 NVARCHAR2(255),
c12 INTEGER,
c13 INTEGER,
c14 INTEGER,
c15 INTEGER,
c16 INTEGER,
c17 INTEGER,
c18 NVARCHAR2(255),
c19 INTEGER NOT NULL,
c20 INTEGER NOT NULL,
c21 NVARCHAR2(50),
c22 INTEGER,
c23 NVARCHAR2(255),
c24 NVARCHAR2(255),
c25 NVARCHAR2(255),
c26 NUMBER(1),
c27 NUMBER(1),
c28 INTEGER,
c29 INTEGER,
c30 INTEGER NOT NULL,
c31 INTEGER NOT NULL,
c32 NCLOB,
c33 NCLOB,
c34 DATE,
c35 DATE,
c36 NVARCHAR2(21),
c37 NCLOB,
c38 NVARCHAR2(21),
c39 INTEGER,
c40 INTEGER,
c41 NUMBER(1) DEFAULT 0 NOT NULL,
c42 NVARCHAR2(2000),
c43 NVARCHAR2(2000),
c44 NVARCHAR2(255),
c45 NVARCHAR2(2000),
c46 NUMBER(1) DEFAULT 0 NOT NULL,
c47 NCLOB,
c48 NCLOB,
c49 NVARCHAR2(255),
c50 NCLOB,
c51 NUMBER(38),
c52 NUMBER(38),
c53 NUMBER(38),
c54 DATE,
c55 INTEGER,
c56 INTEGER,
c57 NCLOB,
c58 NCLOB,
c59 NVARCHAR2(255),
c60 NVARCHAR2(255),
c61 INTEGER,
c62 INTEGER,
c63 INTEGER,
c64 NUMBER(1) DEFAULT 0 NOT NULL,
c65 NCLOB,
c66 NCLOB,
c67 NCLOB,
c68 NCLOB
);
Thank you
RA
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