EXTRACT HOUR MINUTE 月 MONTHNAME NOW QUARTER SECOND TIMESTAMPADD TIMESTAMPDIFF WEEK 年 DATABASE IFNULL USER 注意 如果您嘗試使用資料庫不支援的函數,將會發生錯誤。 日期和時間常值 日期、時間和時間戳記常值的逸出語法如下: SQL 複製 {literal-type 'value'} 其中literal-type 是下...
either from left or from right; in the particular example the delimiter is comma, and it is lo...
也就是说,像 query(User.id, User.id.label(‘foo’)) 这样的查询现在将分别跟踪每个 “User.id” 表达式的值,而不是将它们混合在一起。预计不会影响任何用户;但是,如果使用 select() 结合 query.from_statement() 并尝试加载完全组合的 ORM 实体,则可能会出现问题,因为 select() 将不再将带有任意 .label...
EXTRACT FALSE FIRST FROM FULL GROUP HAVING HOUR HOURS IN INNER INTERVAL IS JOIN LEFT LIKE LIMIT MATCH MINUTE MINUTES MONTH NATURAL NOT NULL NULLS ON OR ORDER OUTER RIGHT RLIKE QUERY SECOND SECONDS SELECT SESSION TABLE TABLES THEN TO TRUE ...
EXTRACT、date_part函数支持的field: 数组函数; 聚合函数: 1.AVG返回指定组中的平均值,空值被忽略。 例:select prd_no,avg(qty)from sales group by prd_no2.COUNT返回指定组中项目的数量。 例:selectcount(prd_no)from sales3.MAX返回指定数据的最大值。
EXTRACT, FALSE, FETCH, FILTER, FINAL, FIRST, FIRST_VALUE, FLOAT, FLOOR, FOLLOWING, FOR, FOREIGN, FORTRAN, FOUND, FRAC_SECOND, FREE, FROM, FULL, FUNCTION, FUSION, G, GENERAL, GENERATED, GET, GLOBAL, GO, GOTO, GRANT, GRANTED, GROUP, GROUPING, HAVING, HIERARCHY, HOLD, HOUR, IDENTITY, ...
NOT_ALLOWED_IN_FROM、NOT_ALLOWED_IN_PIPE_OPERATOR_WHERE、NOT_A_CONSTANT_STRING、NOT_UNRESOLVED_ENCODER、PARSE_MODE_UNSUPPORTED、PARSE_SYNTAX_ERROR、PROCEDURE_CREATION_PARAMETER_OUT_INOUT_WITH_DEFAULT、REF_DEFAULT_VALUE_IS_NOT_ALLOWED_IN_PARTITION、SORT_BY_WITHOUT_BUCKETING、SPECIFY_BUCKETING_IS_NOT_...
SQL_SNVF_CHARACTER_LENGTHSQL_SNVF_EXTRACTSQL_SNVF_OCTET_LENGTHSQL_SNVF_POSITION SQL_SQL92_PREDICATES 3.0 一个SQLUINTEGER 位掩码,用于枚举 SELECT 语句中支持的谓词,如 SQL-92 中定义。必须支持此功能的 SQL-92 或 FIPS 一致性级别显示在每个位掩码旁边的括号中。以下位掩码用于确定数据源支持的选项:SQL_...
encode(str, charset) - Encodes the first argument using the second argument character set. Examples:> SELECT encode('abc', 'utf-8');abc 5.format_string/printf格式化字符串 format_string(strfmt, obj, ...) - Returns a formatted string from printf-style format strings. ...
Strings are a data type used to store character-based information. SQL string functions are pre-defined functions. You can use them to manipulate string values and perform various database operations. String functions process and return results which may be strings or numeric values. You will use...