create table#t1(c1 int,c2 int);create table#t2(c1 int,c2 int);insert into #t1values(1,2);insert into #t1values(1,3);insert into #t2values(1,2);insert into #t2values(1,null);select*from #t1 where c2 notin(select c2 from #t2);-->执行结果:无 select*from #t1 where notexists...
create type rec_cjr is record ( cjrid varchar2(30) , tk integer ); cjr rec_cjr array; 小结: 1. postgresql使用array替代了PL/SQL的table定义。 2. 复合类型的数组,不能直接修改复合类型的element,需要先用标量修改好后赋值。 3.PL/SQL的type是局部变量,而PostgreSQL的type是全局的,这个也需要注意,如...
SCOTT@PROD>create table testasselect*from emp;SCOTT@PROD>insert into test select*from test;SCOTT@PROD>/ 代码语言:javascript 代码运行次数:0 运行 AI代码解释 SCOTT@PROD>deletefrom test;SCOTT@PROD>commit; 代码语言:javascript 代码运行次数:0 运行 AI代码解释 SCOTT@PROD>analyze table test compute statis...
SELECT area, -- 区域 price -- 价格 from company_sales_record 自定义SQL中多表关联时,需要注意表别名和字段别名的使用,以及不同数据库语法对别名的写法可能不同。 数据集自定义SQL的行数没有限制,但是自定义SQL字符长度不能超过65536个字符。必要时可以对自定义SQL做拆分和逻辑优化,或者分开建多个数据集,然后...
IF v_partition_keyISNOTNULLTHENv_table_ddl :=v_table_ddl||' PARTITION BY '||v_partition_key;ENDIF;ENDIF; v_table_ddl :=v_table_ddl||';'||E'\n';-- suffix create statement with all of the indexes on the tableFORv_index_recordINSELECTregexp_replace(indexdef,' "?'||schemaname|...
解释:RESTORE from compressed backups on SQL Server 2008 Standard Edition is possible, although the backup compression feature is not supported in SQL Server 2008 Standard Edition. 参考:备份压缩 (SQL Server) 2.Identity 题目:We want to insert record into table a create table a (a int identity...
解决方法:SQL方式执行INSERT时,需要将数据写入指定的分区子表。详情请参见CREATE PARTITION TABLE。 报错:SELECT INTO is not supported now. 问题原因:Hologres不支持使用SELECT INTO语法。 解决方法:您可使用INSERT INTO SELECT方式插入数据,详情请参见INSERT。
Simple CREATE TABLE syntax (common if not using options): syntaxsql Copy CREATE TABLE { database_name.schema_name.table_name | schema_name.table_name | table_name } ( { <column_definition> } [ ,... n ] ) [ ; ] Full syntax Disk-based CREATE TABLE syntax: syntaxsql Copy CREATE...
CREATE TABLE TableName( columnName1 TYPE, columnName2 TYPE, columnName3 TYPE ); GO Here is a simple break-down of the syntax: The “CREATE TABLE” command does just what it says, it creates a table in a database. The “TableName” represents the name we wish to assign to the table...
Simple CREATE TABLE syntax (common if not using options): syntaxsql Copy CREATE TABLE { database_name.schema_name.table_name | schema_name.table_name | table_name } ( { <column_definition> } [ ,... n ] ) [ ; ] Full syntax Disk-based CREATE TABLE syntax: syntaxsql Copy CREATE...