stringfunc.hlp
上传用户:blenddy
上传日期:2007-01-07
资源大小:6495k
文件大小:2k
- .pgaw:Help.f.t insert end
- "String functionsnn" {title}
- "SQL92 String Functions" {bold}
- " - SQL92 defines string functions with specific syntax. Some of these are implemented using other Postgres functions. The supported string types for SQL92 are char, varchar, and text.
- " {} "
- char_length(string)" {bold} "
- Returns: int4
- length of string" {} "
- character_length(string)" {bold} "
- Returns: int4
- length of string" {} "
- lower(string)" {bold} "
- Returns: string
- convert string to lower case" {} "
- octet_length(string)" {bold} "
- Returns: int4
- storage length of string" {} "
- position(string in string)" {bold} "
- Returns: int4
- location of specified substring" {} "
- substring(string [from int] [for int])" {bold} "
- Returns: string
- extract specified substring" {} "
- trim([leading|trailing|both] [string] from string)" {bold} "
- Returns: string
- trim characters from string" {} "
- upper(text)" {bold} "
- Returns: text
- convert text to upper case
- Many additional string functions are available for text, varchar(), and char() types. Some are used internally to implement the SQL92 string functions listed above.
- " {} "PostgreSQL String Functions
- char(text)" {bold} "
- Returns: char
- convert text to char type
- " {} "char(varchar)" {bold} "
- Returns: char
- convert varchar to char type
- " {} "initcap(text)" {bold} "
- Returns: text
- first letter of each word to upper case
- " {} "lpad(text,int,text)" {bold} "
- Returns: text
- left pad string to specified length
- " {} "ltrim(text,text)" {bold} "
- Returns: text
- left trim characters from text
- " {} "textpos(text,text)" {bold} "
- Returns:text
- locate specified substring
- " {} "rpad(text,int,text)" {bold} "
- Returns: text
- right pad string to specified length
- " {} "rtrim(text,text)" {bold} "
- Returns: text
- right trim characters from text
- " {} "substr(text,int[,int])" {bold} "
- Returns: text
- extract specified substring
- " {} "text(char)" {bold} "
- Returns: text
- convert char to text type
- " {} "text(varchar)" {bold} "
- Returns: text
- convert varchar to text type
- " {} "translate(text,from,to)" {bold} "
- Returns: text
- convert character in string
- " {} "varchar(char)" {bold} "
- Returns: varchar
- convert char to varchar type
- " {} "varchar(text)" {bold} "
- Returns: varchar
- convert text to varchar type
- Most functions explicitly defined for text will work for char() and varchar() arguments.
- " {}
- "PostgreSQL functionsn" {link pgfunctions}
- "Next - Date/Time functions" {link datefunc}