LEFT (<character_expression>, <integer_expression>) 返回character_expression 左起 integer_expression 个字符。 2、RIGHT() RIGHT (<character_expression>, <integer_expression>) 返回character_expression 右起 integer_expression 个字符。 3、SUBSTRING() SUBSTRING (<expression>, <starting_ position>, length...
SELECT SUBSTRING('HELLO WORLD',4,5) And now the results: As you can see. SUBSTRING includes spaces as a position within a string. So executing this query shows a "window" of the string that has been passed to it. If we had executed the query as "SELECT SUBSTRING('HELLO...
LEFT (<character_expression>, <integer_expression>) 返回character_expression 左起 integer_expression 个字符。 2、RIGHT() RIGHT (<character_expression>, <integer_expression>) 返回character_expression 右起 integer_expression 个字符。 3、SUBSTRING() SUBSTRING (<expression>, <starting_ position>, length...
CHARACTER_LENGTH INNER SIZE CHECK INPUT SMALLINT CLOSE INSENSITIVE SOME COALESCE INSERT SPACE COLLATE INT SQL COLLATION INTEGER SQLCA COLUMN INTERSECT SQLCODE COMMIT INTERVAL SQLERROR CONNECT INTO SQLSTATE CONNECTION IS SQLWARNING CONSTRAINT ISOLATION SUBSTRING CONSTRAINTS JOIN SUM CONTINUE KEY SYSTEM_USER ...
三、取子串函数 1、left() LEFT (<character_expression>, <integer_expression>) 返回character_expression 左起 integer_expression 个字符。 2、RIGHT() RIGHT (<character_expression>, <integer_expression>) 返回character_expression 右起 integer_expression 个字符。 3、SUBSTRING() SUBSTRING (<expression>,...
CHARACTER LOCATOR SQLWARNING CLASS MAP START CLOB MATCH 狀態 COLLATION MEMBER STATEMENT COLLECT METHOD STATIC COMPLETION MINUTE STDDEV_POP CONDITION MOD STDDEV_SAMP CONNECT MODIFIES STRUCTURE CONNECTION MODIFY SUBMULTISET CONSTRAINTS MODULE SUBSTRING_REGEX CONSTRUCTOR 月 SYMMETRIC ...
字符串函数用于对字符和二进制字符进行各种操作1.ASCII()函数 ASCII(character_expression)函数用于返回字符串表达式中最左侧的ASCII代码值。参数character_expression必须是一个char或varchar类型的字符串表达式。eg: select ASCII('s'),ASCII('sql'),ASCII('1');执行结果如图:字符's'的ASCII python sql字符串中...
substring_index 函式 sum 函式 table_changes 函式 tan 函式 tanh 函式 tildesign 運算子 timediff 函式 timestamp 函式 timestamp_micros 函式 timestamp_millis 函式 timestamp_seconds 函式 timestampadd 函式 timestampdiff 函式 tinyint 函式 to_avro函式 to_binary 函式 to_char 函式 t...
position Is an integer that specifies where the substring begins.length Is an integer that specifies the length of the substring as number of characters.Result TypesDT_WSTRRemarksSUBSTRING uses a one-based index. If position is 1, the substring begins with the first character in character_...
substring 函数 substring_index 函数 sum 聚合函数 table_changes 表值函数 tan 函数 tanh 函数 ~(波形符号)运算符 timediff 函数 timestamp 函数 timestamp_micros 函数 timestamp_millis 函数 timestamp_seconds 函数 timestampadd 函数 timestampdiff 函数 tinyint 函数 to_avro 函数 to_binary 函数 to_char 函...