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javax.net.ssl.SSLHandshakeException: Connection closed by peer in Android 5.0 Lollipop Recently, there is a error occurs when access website via ssl connection like below although it worked fine several days ago. // Enable SSL... Close window without confirm (I.E only) window.opener=null; window.open('','_self'); window.close(); focus on validating function focusOnInvalidControl() {     for (var i = 0; i < Page_Validators.length; i++) {         if (!Page_Validators[i].isvalid) {     ...
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Detect column exist
Sql server: 
-- Add new column if column not exists
IF NOT EXISTS(SELECT * FROM sys.columns WHERE Name = N'ColumnName' AND Object_ID = Object_ID(N'TableName'))
ALTER TABLE [TableName] ADD [ColumnName] VARCHAR(200)


-- Modify column name if new column not exists
IF NOT EXISTS(SELECT * FROM sys.columns WHERE Name = N'NewColumnName' AND Object_ID = Object_ID(N'TableName'))
EXECUTE sp_rename N'TableName.OldColumnName', N'NewColumnName', 'COLUMN'