this is a buffer allocated for each client, so you should not set the global variable to a large value. Instead, change the session variable only from within those clients that
CASE Statement on multiple columns CASE STATEMENT RETURNING MULTIPLE ROWS Case Statement returning multiple values CASE statement returns "Invalid Column Name" Error Case statement that increments variable with 1 is giving error Case Statement using Divide CASE Statement when not null , else if Help Ca...
You can change the SQL mode at runtime by using aSET [GLOBAL|SESSION] sql_mode='modes'statement to set thesql_modesystem value. Setting theGLOBALvariable requires theSUPERprivilege and affects the operation of all clients that connect from that time on. Setting theSESSIONvariable affects only t...
You can change the SQL mode at runtime by using aSET [GLOBAL|SESSION] sql_mode='modes'statement to set thesql_modesystem value. Setting theGLOBALvariable requires theSUPERprivilege and affects the operation of all clients that connect from that time on. Setting theSESSIONvariable affects only t...
SELECTname,unit_price,unit_price * 1.1 ‘new price’FROM products如上面这个例子所示,取别名时,AS 可省,空格后跟别名就行,可看作是SQL会将将列变量及其数学运算之后的第一个空格识别为AS WHERE子句 WHERE是行筛选条件,实际是一行一行/一条条记录依次验证是否符合条件,进行筛选 ...
SelectSetVariable 类型公开以下成员。 属性 展开表 名称说明 AssignmentKind Gets or sets the assignment operator used. Expression Gets or sets the expression that is going to be used to set the variable. FirstTokenIndex Gets or sets the first token index. (从 TSqlFragment 继承。) FragmentLength...
要分配变量,建议使用 SET @local_variable,而不是 SELECT @local_variable。 Transact-SQL 语法约定 语法 syntaxsql 复制 SELECT { @local_variable { = | += | -= | *= | /= | %= | &= | ^= | |= } expression } [ ,...n ] [ ; ] 参数 @local_variable 要为其赋值的声明变量。 {...
SelectFunctionReturnType SelectInsertSource SelectiveXmlIndexPromotedPath SelectScalarExpression SelectSetVariable SelectStarExpression SelectStatement SelectStatementSnippet SemanticFunctionType SemanticTableReference SendStatement SeparatorType SequenceOption SequenceOptionKind SequenceStatement ServerAu...
INSERT INTO… VALUES (), (), () LAST_INSERT_ID() CREATE TABLE … AS UPDATE … SET … WHERE … 子查询 DELETE FROM 1-Column Attributes 列属性 sql_store.customers design mode sql_store.customers design mode INT integer整数 VARCHAR variable character 可变字符 ...
DELTA_MERGE_ADD_VOID_COLUMN、DELTA_MERGE_INCOMPATIBLE_DATATYPE、DELTA_NOT_NULL_COLUMN_NOT_FOUND_IN_STRUCT、EVENT_TIME_IS_NOT_ON_TIMESTAMP_TYPE、INVALID_VARIABLE_TYPE_FOR_QUERY_EXECUTE_IMMEDIATE、PIVOT_VALUE_DATA_TYPE_MISMATCH、UNEXPECTED_INPUT_TYPE、UNEXPECTED_INPUT_TYPE_OF_NAMED_PARAMETER、UNPIVOT_...