PostgreSQL provides various array functions such asARRAY_APPEND(), ARRAY_TO_STRING(), ARRAY_REPLACE(), etc.STRING_TO_ARRAY()is one of them. Each array function serves a unique functionality. For instance, the STRING_TO_ARRAY() function converts a string into an array. This write-up will ...
说明:Convertstringtodest_encoding. The original encodingisspecifiedbysrc_encoding. The string must be validinthis encoding. Conversions can be definedbyCREATECONVERSION. Also there aresomepredefined conversions. SeeTable9-7foravailable conversions. 转换字符串编码,指定源编码与目标编码 例子:convert('text_...
select '1' = any(string_to_array( array_to_string( array(select stu_id from student),',') ,',')); -- array_to_string用法 -- array() 把查询出来的name字段转换为array数组 -- array_to_string(’数组‘,'/')把数组转化为字符串,并用‘,'连接(使用提供的分隔符连接数组元素) select stu_...
String[] canada = {"Montreal", "Toronto", "Vancouver"}; String[] uk = {"London", "Birmingham", "Oxford"}; /* Convert String[] to java.sql.Array using JDBC API */ Array arrayUSA = conn.createArrayOf("text", usa); Array arrayCanada = conn.createArrayOf("text", canada); Array ...
convert(string using conversion_name) text 使用指定的转换名字改变编码。 convert('PostgreSQL' using iso_8859_1_to_utf8) 'PostgreSQL' lower(string) text 把字串转化为小写 lower('TOM') tom octet_length(string) int 字串中的字节数 octet_length('jose') 4 overlay(string placing string from int ...
函数：lower(string)说明：Convert string to lower case 转换字符串为⼩写 例⼦：bit_length('jose') = 32 函数：octet_length(string)说明：Number of bytes in string 计算字符串的字节数 例⼦：octet_length('jose') = 4 函数：overlay(string placing string from int [for int])说明：Replace ...
Fixed issues with DATEPART(), DATENAME(), DATEDIFF() and DATEADD() functions to convert string to datetime and to recognize mi units. Support for TRY_CONVERT() function. Fixed issue with using strict/lax jsonpath with arrays to avoid OPENJSON error: "syntax error at or near " " of jsonpat...
regexp_split_to_array函数的行为和regexp_split_to_table相同,不过regexp_split_to_array会把它的结果以一个text数组的形式返回。它的语法是regexp_split_to_array(string, pattern [, flags ])。这些参数和regexp_split_to_table的相同。 一些例子: ...
typarray:指向同类型的数组类型的Oid。typinput,typoutput:类型的输入输出函数,数据库进行对数字进行存储或者输出,首先由客户端获取数据 (一般为字符串 )进行转化,变为数据库能够使用的数据类型。输出函数亦然。typreceive,typsend:输入、输出转换函数,多用于二进制格式。typmodin,typmodout:对于变长的数据的输入、...
Iseg String String Box String String Path String String Polygon String String Circle String String Cidr String String Inet String String Macaddr String String Macaddr8 String String Tsvector String String Tsquery String String UUID Guid Guid Json String String Jsonb String String Array String String ...