Table 8.1 shows all the built-in general-purpose data types. Most of the alternative names listed in the “Aliases” column are the names used internally by PostgreSQL for historical reasons. In addition, some internally used or deprecated types are available, but are not listed here. 表8.1显...
PostgreSQL provides two data types that are designed to support full text search, which is the activity of searching through a collection of natural-language documents to locate those that best match a query. The tsvector type represents a document in a form optimized for text search; the tsquer...
AzureSqlTableDataset AzureStorageAuthenticationType AzureStorageLinkedService AzureSynapseArtifactsLinkedService AzureTableDataset AzureTableSink AzureTableSource AzureTableStorageLinkedService BigDataPoolParametrizationReference BigDataPoolReferenceType BinaryDataset BinaryReadSettings BinarySink BinarySource BlobEventTypes ...
几何类型(geometric types) point,二维平面上的点,用(x, y)表示,x、y分别表示x轴、y轴的坐标值 mydb=# create table test_point (name text, pt point); mydb=# INSERT INTO test_point (name, pt) VALUES ('p1', '(1.1,22.0)'); mydb=# INSERT INTO test_point (name, pt) VALUES ('p2'...
PostgreSQL Data Types Data Types This document discusses PostgreSQL Data Types. While creating table, for each column, you specify a data type, i.e. what kind of data you want to store. This enables several benefits: Consistency: A column can can store a single type of value. So, when ...
LIKE source_table [ like_option … ] The LIKE clause specifies a table from which the new table automatically copies all column names, their data types, and their not-null constraints. 如上所示,当使用LIKE子句做表复制时,默认会自动拷贝所有字段、字段类型以及它们的NOT-NULL约束,这也就解释了刚才为...
export interface TableTypes { users: { select: Users; input: UsersInput; }; } export const tables = { users, } pg-to-ts 类型化查询 以下是我在 PostgreSQL 查询中使用生成类型的示例,但这些类型定义也可以用作组件的 props 接口的一部分。
CREATE TABLE on_hand(item inventory_item,count integer); 复合值输入 复合值可以插入文字常量,封装领域括号内的值,并用逗号将它们隔开。一个例子是如下: INSERT INTO on_hand VALUES(ROW('fuzzy dice',42,1.99),1000);yiibai.com 此有效的定义同上的inventory_item的。行关键字实际上是可选的表达式中,只要有...
The LIKE clause specifies a table from which the new table automatically copies all column names, their data types, and their not-null constraints. 如上所示,当使用LIKE子句做表复制时,默认会自动拷贝所有字段、字段类型以及它们的NOT-NULL约束,这也就解释了刚才为什么会成功复制NOT-NULL约束。
table The PostgreSQL table name. Type: string (or Expression with resultType string). tableName This property will be retired. Please consider using schema + table properties instead. type Polymorphic discriminator, which specifies the different types this object can beInherited...