FROMtableORDER BYcolumn list 这个用法使用PostgreSQL 排序的代码 ORDER BY 来匹配索引,在对未排序的数据操作时速度快得多. 然后你可以删除旧表,用ALTER TABLE...RENAME将new table改成旧表名, 并且重建该表所有索引.唯一的问题是 OID 将不保留.这时再做CLUSTER将快得多, 因为大多数堆栈数据已经排过序了而且使...
Oracle 数据类型默认SQL Server 数据类型 bfile varbinary(max) binary_double float[53] binary_float float[53] binary_integer int blob varbinary(max) boolean bit char varchar(max) char varying varchar(max) character varchar(max) character varying varchar(max) Clob varchar(max) date datet...
Oracle 資料類型預設SQL Server 資料類型 Bfile varbinary(max) binary_double float[53] binary_float float[53] blob varbinary(max) char char char varying[*..*] varchar[*] char[*..*] char[*] character char character varying[*..*] varchar[*] character[*..*] char[*] CLOB...
The %PATH% must include the %ORACLE_HOME% \bin directory as the first Oracle entry that is encountered. For information about setting environment variables, see the Windows documentation. Note If you have more than one Oracle home on the SQL Server Distributor, ensure that the Distribution ...
REMOVE_SET— Remove all occurrences of a value from an array, as if removing an element from a set. RENAME— Rename a field. REPLACE— Replace data at a given location. SET— Set a SQL/JSON variable to a specified value, or insert or replace data at a given location. SORT— ...
You can use any non-alphanumeric character such as "/" or "!" as a sepchar. You can omit the space between CHANGE and the first sepchar. DEL [n | n m | n * | n LAST | * | * n | * LAST | LAST] Deletes one or more lines of the SQL buffer ("*" indicates the ...
21:10:29,048 ERROR [io.undertow.request] (default task-1) UT005023: Exception handling request to /jdbc-test/query: java.lang.RuntimeException: java.sql.SQLException: Non supported character set (add orai18n.jar in your classpath): JA16SJISTILDE ...
-M | --mssql : Export a Microsoft SQL Server database. -n | --namespace schema : Set the Oracle schema to extract from. -N | --pg_schema schema : Set PostgreSQL's search_path. -o | --out file : Set the path to the output file where SQL will be written. Default: output....
What are the sizes for the setString, setCharacterStream, and setAsciiStream? FormStmtDriverLower LimitUpper LimitBind mechanismNote AllAllAll00Null AllSQLClient1 char32766 charsDirect AllSQLClient32767 chars2147483647 bytesStream AllSQLClient2147483648 bytes2147483647 charsTemp Clob ...
简介:标签PostgreSQL , Oracle , nchar , nvarchar , ntext , ms sql , sybase , unicode character , utf8背景在Oracle, MS SQL, SYBASE数据库引擎中,有一些这样的字符串类型nchar , nvarchar , ntext。 标签 PostgreSQL , Oracle , nchar , nvarchar , ntext , ms sql , sybase , unicode character , ...