bit_length(string) int 字串里二进制位的个数 bit_length('jose') 32 char_length(string) int 字串中的字符个数 char_length('jose') 4 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...
round(n,integer) -- 对n四舍五入,保留位数为integer; trunc(n,integer) -- 对n截取,截取保留的位数为integer; covert(char,dest_sest,source_set) -- 字符集转换,例:convert(username, 'ZHS16GBK','UTF8'); cast(expr as type_name) -- 数据类型转换,常用于数字与字符间转换,例:cast(id_no as v...
Use our built-in database browser to examine the copied data.Of course, you can also examine the conversion in detail and see in-depth information for each table. Migrate your data now. 60-day money back guarantee Full Convert is used by thousands of organizations in 98 countries. ...
bytea, geography, geometry, text, xml Other array, boolean (bool), cidr, citext, enum, hstore, inet, interval, json, jsonb, macaddr, oid, uuid, varbit (bit varying) Export PostgreSQL database It may make sense to migrate your data away from PostgreSQL. You may want to do it perman...
Given that PostgreSQL doesn't support it in text values, there's no good way to get it to remove it. You could import your data into bytea and later convert it to text using a special function (in perl or something, maybe?), but it's likely going to be easier to do that in pre...
函数:convert_from(string bytea, src_encoding name)说明:Convert string to the database encoding. The original encoding is specified by src_encoding. The string must be valid in this encoding. 转换字符串编码,自己要指定源编码,目标编码默认为数据库指定编码, ...
本节描述了用于检查和操作字符串数值的函数和操作符。在这个环境中的字符串包括所有 character, character varying, text 类型的值。除非另外说明,所有下面列出的函数都可以处理这些类型,不过要小心的是,在使用 character 类型的时候,需要注意自动填充的潜在影响。通常这里描述的函数也能用于非字符串类型,我们只要先把那...
Bit Byte[] Byte[] Bit varying Byte[] Byte[] XML String String IntArray String String TextArray String String NumericArray String String DateArray String String Range String String Bpchar String String Proprietà dell'attività Lookup Per altre informazioni sulle proprietà, vedere Attività Lookup....
Subsequent bytes of the * character can have the high bit not set. When scanning data in such an * encoding to look for a match to a single-byte (ie ASCII) character, we must * use the full pg_encoding_mblen() machinery to skip over multibyte * characters, else we might find a ...