這可讓 Transact-SQL 批次、預存程式和觸發程式一次處理一個數據列。 這也表示無法直接從 API 函式呼叫程式。 數據 指標 輸出參數必須係結至程式變數,但 API 不支援係結 數據指標 參數或變數。 下表顯示 所 sp_describe_cursor_tables傳回之數據指標的格式。 展開資料表 資料行名稱資料類
dbidintID of the database that the table resides in. 0 whenOPENQUERYorOPENROWSETare used. dbnamesysname,nullableName of the database that the table resides in.NULLwhenOPENQUERYorOPENROWSETare used. Remarks sp_describe_cursor_tablesdescribes the base tables referenced by a server curso...
SQL 复制 CREATE TABLE dbo.t ( a INT PRIMARY KEY, b1 INT ); GO CREATE VIEW dbo.v AS SELECT b1 AS b2 FROM dbo.t; GO EXEC sp_describe_first_result_set N'SELECT b2 AS b3 FROM dbo.v', NULL, 0; 以下为部分结果集。展开表 is_hiddencolumn_ordinalnamesource_schemasour...
今天写代码的时候,老是提示在You have an error in your SQL syntax; check the manual that corresponds to yourMySQLserver version for the right syntax to use near ‘describe。 写SQL语句的时候删掉这个字段就不会报错,加上这个字段添加和查询又会报错,纠结了很久,最后终于试着把describe改为describes,可以...
The value being transformed is one of the following: * an argument to a user defined function (UDF) * an input to the SET clause of an UPDATE statement * a value being INSERTed into a table * an input to a cast or adjustment function in some other context * a recursively referenced ...
SQL DESCRIBE TABLE is a SQL statement that is accountable for telling something about a specific table in the database. If we want to show the structure of a database table or tables in the server then, we will use the SQL command DESCRIBE or other keyword DESC, which is identical to ...
If there are no distinct types, the labels are returned in the second set of SQLVAR entries. Otherwise, the labels are returned in the third set of SQLVAR entries. For a declared temporary table, the name of the column is assigned regardless of the value specified in the USING clause ...
10 TEMPORARY_TABLE 無法判斷結果,因為批次包含暫存表,sp_describe_first_result_set 不支援 。 11 UNSUPPORTED_STATEMENT 無法判斷結果,因為批次包含sp_describe_first_result_set不支援的語句(例如 FETCH、REVERT 等)。 12 OBJECT_TYPE_NOT_SUPPORTED 不支援傳遞至函式@object_id ...
explain < SQL> 1. 输出格式 +---+---+---+---+---+---+---+---+---+---+ | id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra | +---+---+---+---+---+---+---+---+---+---...
create table,show tables,describe table,DROP TABLE,ALTER TABLE ,怎么使用? CHAR(30) NOT NULL, first_name CHAR(30) NOT NULL, d DATE NOT NULL); show tables;显示当前数据库中的Tables describe 2.2K10 sparksql(2)——dataframe的ap-printSchema、withColum、count、drop、describe、select ...