大约有 40,000 项符合查询结果(耗时:0.0398秒) [XML]

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How do I reset a sequence in Oracle?

...q_name in varchar2 ) is l_val number; begin execute immediate 'select ' || p_seq_name || '.nextval from dual' INTO l_val; execute immediate 'alter sequence ' || p_seq_name || ' increment by -' || l_val || ' minvalue 0'; ...
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How to get a list of user accounts using the command line in MySQL?

... Use this query: SELECT User FROM mysql.user; Which will output a table like this: +-------+ | User | +-------+ | root | +-------+ | user2 | +-------+ As Matthew Scharley points out in the comments on this answer, you can group by the ...
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Query to list number of records in each table in a database

... If you're using SQL Server 2005 and up, you can also use this: SELECT t.NAME AS TableName, i.name as indexName, p.[Rows], sum(a.total_pages) as TotalPages, sum(a.used_pages) as UsedPages, sum(a.data_pages) as DataPages, (sum(a.total_pages) * 8) / 1024 as To...
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How can I get the list of a columns in a table for a SQLite database?

...(first_name varchar, last_name varchar, email_address varchar); sqlite> select * from sqlite_master; table|people|people|2|CREATE TABLE people (first_name varchar, last_name varchar, email_address varchar) To get column information you can use the pragma table_info(table_name) statement: sqlit...
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Dynamic SELECT TOP @var In SQL Server

... SELECT TOP (@count) * FROM SomeTable This will only work with SQL 2005+ share | improve this answer | ...
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Check if table exists and if it doesn't exist, create it in SQL Server 2008

... Something like this IF NOT EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[YourTable]') AND type in (N'U')) BEGIN CREATE TABLE [dbo].[YourTable]( .... .... .... ) END ...
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How does one reorder columns in a data frame?

... You can also use the subset function: data <- subset(data, select=c(3,2,1)) You should better use the [] operator as in the other answers, but it may be useful to know that you can do a subset and a column reorder operation in a single command. Update: You can also use the select...
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What is the equivalent of 'describe table' in SQL Server?

... use Select * From INFORMATION_SCHEMA.COLUMNS Where TABLE_NAME = 'TABLENAME' if you don't want to use a stored procedure – Matias Elorriaga Aug 4 '14 at 18:21 ...
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Get first day of week in SQL Server

...in that there should be some sensible logic built in to round up or down: SELECT DATEDIFF(YEAR, '2010-01-01', '2011-12-31'); SELECT DATEDIFF(YEAR, '2010-12-31', '2011-01-01'); To answer how to get a Sunday: If you want a Sunday, then pick a base date that's not a Monday but rather a Sunday. For ...
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CROSS JOIN vs INNER JOIN in SQL

...ame situation. These 2 examples will return the same result: Cross join select * from table1 cross join table2 where table1.id = table2.fk_id Inner join select * from table1 join table2 on table1.id = table2.fk_id Use the last method ...