interval:时间间隔类型,通过postgresql.conf的intervalstyle调整,或通过set intervalstyle,默认值为postgresql,可设置成sql_standard或iso_8601或postgres_verbose。 9.boolean类型 TRUE/'t'/'true'/'y'/'yes'/'on'/'1' FALSE/'f'/'false'/'n'/'no'/'off'/'0' 10.枚举类型 先定义,然后再用于表或函数的...
double precision, integer, interval, numeric, decimal, real, smallint, time (with or without time zone), timestamp (with or without time zone), xml. SQL指定以下类型(或其拼写):bigint、bit、bit variation、boolean、char、character
variable-length bit string:变长位串 boolean bit boolean bool logical boolean (true/false):布尔值 box rectangular box on a plane bytea binary data ("byte array") character varying varchar character varying [ (n) ] varchar [ (n) ] variable-length character string:变长字符串(长度有限制) var...
Category - Binary Data Types Category - Date/Time Types Category - Boolean Type Category - Enumerated Type Unlike other types, Enumerated Types need to be created using CREATE TYPE command. This type is used to store a static, ordered set of values, for example compass directions,i.e. NORTH...
v_bool boolean not null defalut false; 注:pl/sql中使用标量并给其赋初值的方式不同于其他的编程语言,需要在等号前加":" 2.2、标量使用的案例 作用:变量是存放pl/sql块中最普通的变量 输入一个员工号,显示雇员的姓名、工资、个人所得税(税率为0.03),代码如下: ...
autosummarize (boolean):定义是否只要在下一个页面上检测到插入就为前面的页面范围运行概要操作。 B-tree 索引 Btree 结构 meta page和root page是一定有的,meta page需要一个页来存储,表示指向root page的page id。随着记录数的增加,一个root page可能存不下所有的heap item,就会有leaf page,甚至branch page,甚...
Boolean The Boolean data type is designed to express two-state values such as true/false, on/off, yes/no, and null values. You would commonly use this data type to evaluate conditional statements. Control flow can be contingent on the outcome of either true or false, like when using the...
GET DIAGNOSTICS integer_var = ROW_COUNT; The second method to determine the effects of a command is to check the special variable named FOUND, which is of type boolean. FOUND starts out false within each PL/pgSQLfunction call. It is set by each of the following types of statements: ...
布尔类型(boolean type) 用于表示true或false mydb=# \d test_bool; Table "public.test_bool" Column | Type | Collation | Nullable | Default ---+---+---+---+--- flag | boolean | | | remark | text | | | mydb=# insert into test_bool (flag, remark) values ('t', 'True'), ...
org.postgresql.util.PSQLException: ERROR: column "name" is of type smallint but expression is of type booleaupdate from xx set name = false where name = true错误原因：在update/insert赋值语句的时候，字段类型是smallint，但是传参却是布尔值类型解决办法：Postgres数据库添加boolean <-> smallint 的...