1.2 主从原理架构 MySQL主从同步至少需要用到2台服务器,一台为master库,另一台为slave库,要实现复制首先需要在master上开启bin-log日志功能,bin-log日志用于记录在Master库中执行的增、删、修改、更新操作的sql语句,整个过程需要开启3个线程,分别是Master开启IO线程,Slave开启IO线程和SQL线程。 2. 准备实验环境 这个...
SQL_ACTIVE_ENVIRONMENTS SQL_ASYNC_DBC_FUNCTIONS SQL_ASYNC_MODE SQL_ASYNC_NOTIFICATION SQL_BATCH_ROW_COUNT SQL_BATCH_SUPPORT SQL_DATA_SOURCE_NAME SQL_DRIVER_AWARE_POOLING_SUPPORTED SQL_DRIVER_HDBC SQL_DRIVER_HDESC SQL_DRIVER_HENV SQL_DRIVER_HLIB SQL_DRIVER_HSTMT SQL_DRIVER_NAME SQL_DRIVER_ODBC...
GET DIAGNOSTICS@c1=NUMBER,@c2=ROW_COUNT; 要获取条件信息,需要指定条件编号并将所需条件项检索到目标变量中。如下示例中,GET DIAGNOSTICS实例将SQLSTATE值和错误消息分配给了用户变量@c3和@c4: GET DIAGNOSTICS CONDITION3@c3=RETURNED_SQLSTATE,@c4=MESSAGE_TEXT; ...
GET DIAGNOSTICS @c1 = NUMBER, @c2 = ROW_COUNT; 要获取条件信息,需要指定条件编号并将所需条件项检索到目标变量中。如下示例中,GET DIAGNOSTICS 实例将 SQLSTATE 值和错误消息分配给了用户变量 @c3 和@c4: GET DIAGNOSTICS CONDITION 3 @c3 = RETURNED_SQLSTATE, @c4 = MESSAGE_TEXT; 当条件发生时,也...
SQL_SQ_INSQL_SQ_QUANTIFIEDSQL_SQ_CORRELATED_SUBQUERIES位掩碼表示支援子查詢的所有述詞都支援相互關聯的子查詢。SQL-92 入門層級一致性驅動程式一律會傳回位掩碼,其中已設定所有這些位。 SQL_SYSTEM_FUNCTIONS 1.0 SQLUINTEGER 位掩碼,列舉驅動程式和相關聯數據源所支援的純量系統函式。下列位掩碼可用來判斷支援...
SQLRETURN SQLGetInfo( SQLHDBC ConnectionHandle, SQLUSMALLINT InfoType, SQLPOINTER InfoValuePtr, SQLSMALLINT BufferLength, SQLSMALLINT * StringLengthPtr); Arguments ConnectionHandle [Input] Connection handle. InfoType [Input] Type of information. InfoValuePtr [Output] Pointer to a buffer in which...
private static void TestGetValues(SqlDataReader reader) { // Given a SqlDataReader, use the GetValues // method to retrieve a full row of data. // Test the GetValues method, passing in an array large // enough for all the columns. Object[] values = new Object[reader.FieldCount]; in...
[Microsoft][ODBC SQL Server Driver][DBNETLIB] General Network error. Check your network documentation [OLE DB Destination [16]] Error: Failed to open a fastload rowset for "[dbo].[tempMaster]". Check that the object exists in the database. [Script Component ] Error: The collection of var...
May 16, 2020 06:32PM Re: How to get row number of a query kenneth watanabe May 17, 2020 09:14AM Re: How to get row number of a query Peter Brawley May 17, 2020 11:15AM Sorry, you can't reply to this topic. It has been closed....
SQL_BRC_PROCEDURES SQL_BRC_EXPLICIT SQL_BATCH_SUPPORT (32 位掩码) 指示支持的批处理级别: SQL_BS_SELECT_EXPLICIT: 支持可具有生成结果集的语句的显式批处理。 SQL_BS_ROW_COUNT_EXPLICIT: 支持可具有生成行计数的语句的显式批处理。 SQL_BS_SELECT_PROC: 支持可具有生成结果集的语句的显式过程。 SQL_BS...