怎么用SQL语句查看Informix数据库表中的结构

2025-01-01 02:49:43
推荐回答(3个)
回答1:

informix查询表结构方法有多种,可以通过系统信息表查询,也可以通过系统功能查询

查询系统表存储信息步骤:

  • 登录数据库 

    dbaccess xxxdb ; 

  • 执行查询语句 

    SELECT c.colname[1,20], c.coltype, c.collength

    FROM syscolumns c, systables t

    WHERE c.tabid = t.tabid

    AND t.tabname = 'xxxTable';


通过系统提供的命令功能查询:

    dbaccess - info 查询表信息

    dbschema命令导出表结构

回答2:

SELECT c.colname, c.coltype FROM syscolumns c, systables t WHERE c.tabid = t.tabid AND t.tabname = 'xxxTable'

coltype 字段意义:
0 = CHAR 8 = MONEY
1 = SMALLINT 10 = DATETIME
2 = INTEGER 11 = BYTE
3 = FLOAT 12 = TEXT
4 = SMALLFLOAT 13 = VARCHAR
5 = DECIMAL 14 = INTERVAL
6 = SERIAL 15 = NCHAR
7 = DATE 16 = NVARCHAR

回答3:

desc tablename;