informix serial data type

Informix IDS databases are widely used in various industries such as finance, telecommunications, and postal services. It is a multi-threaded relational database server that adopts symmetric multi-processor technology and single-processor

Oracle basic concepts and comparison with informix I. ConceptsUser: informix directly uses the user management system of the operating system. Generally, root and informix are used as super operators to manage other users. Oracle has its own user

Informix-SQLVersion6.05.UD1 Application 1. Create and delete databases, base tables, and indexes 1. Syntax conventions: Indicates a required parameter.{...} Indicates required items.[...] Indicates the option(...) Indicates a part of the statement.|

1. Introduction         stored procedure (Stored Procedure) is a set of SQL statements that are compiled and stored in a database in order to accomplish a specific function. The user executes it by specifying the name of the stored procedure and

SQL statement used to query fields of all INFORMIX data tables: Select a. tabname, B. colname, B. coltype,Case B. coltypeWhen '0' then 'Char'When '1' then 'smallint'When '2' then' integer'When '3' then 'float'When '4' then 'smallfloat'When '5' then '

Field Type of Informix Field Type Description Field Length and default value Char (size) It is used to save string data of a fixed length (size) byte. Fill in space for less than the fixed length of each line). The

field types for Informix Field type Describe Field length and its default values char (size) String data that is used to hold fixed-length (size) bytes. A fixed length of each line (less than a space), a

After checking Oracle's process command output, the output display should include at least some of the following processes:Oracle The process of writing a data file, the output appears as: "ORA_DBW0_ORCL" Oracle The process of writing log files, the

Relational Database Informix-4GL Program Design 1. Key and methods for designing relational database programs 1. Key factors for successfully designing a relational database:①. Gain an in-depth understanding of internal organizations and needs of

I. Intrinsic functions1. Internal aggregate function1) Count (*) returns the number of rows2) Count (DISTINCT colname) returns the number of unique values in the specified column3) SUM (colname/expression) Returns the value of the specified column