Specifies the type of data being stored (string, date, numeric, etc).

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1answer
43 views

What kind of data type to use for numbering in the Harmonized System?

The harmonized system uses a numbering that shows the hierarchy between different items. Similar to bookkeeping ledger numbers. Here is an example: 01 LIVE ANIMALS 0103 swine, live 010310 Purebred ...
0
votes
5answers
420 views

define rating column in table?

Hi I am creating database for rating the items in my list but I want to ask what this if I have five stars rating how can I do it in database "rating" column should I use Int with check constraint or ...
0
votes
1answer
503 views

Why does Oracle store time in DATE column?

I have a table with a date column. I used JDBC to save a java.util.Date object into the table. When I run following query I get date aswell as a time value: select To_CHAR(departure_date,'DD-MM-YYYY ...
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votes
4answers
754 views

Writing SQL statement in sqlcmd to hide the milliseconds for column type of time

I have a table called testtable that have a column named expire_time of type [time] The problem is that when I type the following in sqlcmd: select * from testtable It will return the following: ...
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votes
2answers
6k views

work with json in oracle

Is there an easy way to work with JSON within Oracle? I have a stored procedure that I use to call web services quite often, JSON is a format that I am familiar with in web development context, but ...
0
votes
1answer
157 views

Do I lose data if I change from INT to TINYINT

I have a database (Engine InnoDB) that was setup by someone else. I noticed that one column contains data between 1 and 107 at this moment, and it is highly unlikely to further increase much. As it ...
0
votes
1answer
55 views

In a banking organization, why would account balance be declared as varchar and not decimal?

I worked in two organizations where I found money related columns are defined as VARCHAR data type. I didn't get correct explanation from anyone. As the database team is totally isolated with our ...
0
votes
1answer
84 views

Best datatype to store betting odds? [closed]

I have a lot of soccer betting odds (hundreds per match and thousands of matches), for example: <_10Bet_Home_Home>8.00</_10Bet_Home_Home> ...
0
votes
1answer
116 views

Why does mysql give different result for this summations? [duplicate]

Can someone help understand the following behavior? mysql> select (1/3 + 1/3 + 1/3); +-------------------+ | (1/3 + 1/3 + 1/3) | +-------------------+ | 1.0000 | +-------------------+ ...
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votes
1answer
190 views

Inheritance discriminator column better int or varchar or enum?

What is the best practice for storing a discriminator column ? Does it make any difference ? Any pros/cons of using one over the other ? I am using MySql with Entity Framework but the question goes ...
0
votes
1answer
180 views

Initializing values to a custom data type

I have defined a custom data type which I need to use in my procedure. Give below is my data type. CREATE or REPLACE TYPE CUSTOM_DATATYPE AS object( chkinvpre VARCHAR2(100), orderid ...
0
votes
1answer
969 views

Oracle - how to reference to a field%TYPE using database links?

I have this database which includes a couple of schemas. Say I need to access schemaONE from schemaTWO. To do this, I have created a database link named "DB_ONE_LINK". I am able to access to ...
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votes
2answers
288 views

Should numeric identifiers like serial numbers be stored as integers?

Many of our databases store numeric tracking codes (like serial numbers) as integers. There is little chance of these codes every getting alphabetic characters, but it still seems like an incorrect ...
0
votes
1answer
724 views

timeout on updating nvarchar(max) after converting datatype

I recently Upgraded to 2008 Enterprise and took the opportunity to change the biggest table in my db with the maintenance window. ran the following to change my ntext field ALTER TABLE ...
0
votes
1answer
47 views

Does a numeric field always use the same disk space?

When you have a numeric field in MySQL(MYISAM) (E.g. Integer) will it always use the same disk space, no matter what number is actually stored?
0
votes
1answer
486 views

What are commonly used database types? [closed]

There are a lot of database types. Can you list a list of the top classification of databases commonly found in schools and offices? Any help is appreciated. Hope to see compressed and summarized type ...
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votes
0answers
9 views

Object databases and polymorphism [closed]

Since in most programming languages serialization of a polymorphic object does provide only the type of the instantiated class and does not give any "meta" information about attributes coming from ...
0
votes
0answers
56 views

Decimal Data Type as Primary Key

One of my tables is set up like this: create table dbo.Source ( testID decimal (10,3) PRIMARY KEY , column 2 somedatatype , column 3 somedatatype ) Whenever I perform SSIS into this table ...
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votes
2answers
76 views

Find and return items based on matching strings across 17 tables

I must start by saying that I am at best a sql novice. I am doing some data analysis and consolidation for my company and need to find if items match across any of the tables. The info in the tables ...
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votes
0answers
77 views

How should I store image, text type files in mysql?

I came across some answers mentioning the "disasters" of storing files outside database and saving the path inside database. I've also noticed dozens of answers about storing images- which suggest to ...
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votes
0answers
27 views

how to store binary (not blob)

I have a "collection" of boolean values that I need to store, in a database. It's a total of approx. 200 booleans that fit into ~13 groups. Each user that would be registered has his own set of ...
0
votes
0answers
94 views

Best data type to store Active Directory Nullable GUID

I have a table name Employees,inside Sql Server 2008 r2. the table contain the following columns:- UserID. it is the Primary key, and it is auto generated by the DB. GUID. which will store the ...
0
votes
1answer
124 views

MySQL 5.6 Datetime Range

According to MySQL 5.6 doc, the supported range for datetime data type is '1000-01-01 00:00:00' to '9999-12-31 23:59:59'. But when I tried inserting values that are earlier than '1000-01-01 00:00:00', ...
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votes
0answers
694 views

Blob datatype issue with log file

I am getting continuously below error message in mysqld.log [ERROR] InnoDB: The total blob data length (10152274) is greater than 10% of the redo log file size (3072). Please increase ...
0
votes
1answer
112 views

How to use timestamp/rowversion data types in Visio?

I am using Visio 2010 to create a ER diagram. When I insert the column names, I can't find timestamp or rowversion data types. Is there an alternative?
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votes
0answers
328 views

Suppressing the removal of trailing zeros in numeric data type in sql server

I initially declared the data type of the columns for some of the tables i am working on as "NUMERIC". cause of that, trailing zeros are being removed. Is there anyway to suppress this behavior? i ...
0
votes
1answer
817 views

Datetime Difference in MySQL when format is Varchar

I have two columns in a table: STOP and START, of type varchar. I want to have the difference between both columns, and I'm using : SELECT DATEDIFF(stop, start) AS difference from T1; It is ...
0
votes
1answer
2k views

What is the difference between int(8) and int(5) in mysql? [duplicate]

I found out, that if you have a field defined as INT(8) without ZEROFILL it will behave exactly as INT(5) in both cases the maximum value is −2,147,483,648 to 2,147,483,647, from −(2^31) to 2^31 − 1 ...
-1
votes
1answer
364 views

Recommended datatype fixed length in mysql

What's the best data type for store fix length data such as MD5 password 1f3870be274f6c49b3e31a0c6728957f HEX Ccolor f2a709 They don't need character sets. All in absolute [a-z0-9]{6} for color, ...
-1
votes
1answer
541 views

Multiple conditions in a derived column ssis

Hi I am trying fairly new to SSIS , and my task is to convert dates in string as given below to a datetime. These are my date of birth in the source file (string data type): Source date of birth ...
-2
votes
1answer
4k views

What are performance benefits when using number type instead of using char/varchar?

From various posts, I have summarized about using number type instead of char/varchar for PK: If you choose char/varchar type for PK and your values are short (just some alpha numberic codes) then it ...
-3
votes
1answer
86 views

How match a numeric column with a varchar parameter? [closed]

external_id in my source table is of varchar(255) data type I need to convert it to a numeric(20) to do a lookup on target table where card_id (contains external_id's) is of numeric(20) data type. I ...