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How to show SQL queries run in the Rails console?
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In Rails 3+ you can use ActiveRecord::Relation’s to_sql method:
User.where(:id => 3).to_sql
#=> "SELECT \"users\".* FROM \"users\" WHERE \"users\".\"id\" = 3"
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How to Concatenate Numbers and Strings to Format Numbers in T-SQL?
...convert your parameters to VARCHAR before trying to concatenate them. When SQL Server sees @my_int + 'X' it thinks you're trying to add the number "X" to @my_int and it can't do that. Instead try:
SET @ActualWeightDIMS =
CAST(@Actual_Dims_Lenght AS VARCHAR(16)) + 'x' +
CAST(@Actual_Dims_W...
How can i query for null values in entity framework?
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Workaround for Linq-to-SQL:
var result = from entry in table
where entry.something.Equals(value)
select entry;
Workaround for Linq-to-Entities (ouch!):
var result = from entry in table
where (value == null...
How do I drop table variables in SQL-Server? Should I even do this?
... or varchar variables
The scope of a variable is the range of Transact-SQL statements that can reference the variable. The scope of a variable lasts from the point it is declared until the end of the batch or stored procedure in which it is declared.
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How do I get list of all tables in a database using TSQL?
...e best way to get the names of all of the tables in a specific database on SQL Server?
17 Answers
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Can PHP PDO Statements accept the table or column name as parameter?
... case 1:
$tbl = 'users';
break;
}
$sql = "SELECT * FROM $tbl";
}
By leaving no default case or using a default case that returns an error message you ensure that only values that you want used get used.
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Errors: “INSERT EXEC statement cannot be nested.” and “Cannot use the ROLLBACK statement within an I
...ng to 'bubble' up data from a chain of stored procedures. A restriction in SQL Server is you can only have one INSERT-EXEC active at a time. I recommend looking at How to Share Data Between Stored Procedures which is a very thorough article on patterns to work around this type of problem.
For examp...
Comparing Dates in Oracle SQL
...stead of a date literal: timestamp '2015-01-30 19:42:04' (because in ANSI SQL a the date data type doesn't have a time, only the timestamp data type does).
– a_horse_with_no_name
Feb 3 '15 at 22:27
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How to store decimal values in SQL Server?
I'm trying to figure out decimal data type of a column in the SQL Server. I need to be able to store values like 15.5, 26.9, 24.7, 9.8, etc
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How to drop a table if it exists?
...an use
IF OBJECT_ID('tempdb.dbo.#T', 'U') IS NOT NULL
DROP TABLE #T;
SQL Server 2016+ has a better way, using DROP TABLE IF EXISTS …. See the answer by @Jovan.
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